DOCSLIB.ORG

Acacia Dealbata 2 Now It Is Also That Time of Year Once Again, End of Financial Some Acacias from the Darling Downs 5 Year, When Subscriptions and Reports Are Due

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text

Load more

Association of Societies for Growing Australian Plants ACACIA STUDY GROUP NEWSLETTER Group Leader Newsletter Editor Esther Brueggemeier Bill Aitchison 28 Staton Cr, Westlake, Vic 3337 13 Conos Court, Donvale, Vic 3111 Phone 0411 148874 Phone (03) 98723583 Email: [email protected] Email: [email protected] No. 101 June 2008 ISSN 1035-4638 I would like to say a big, warm 'Thank you' to all the support Contents Page and help from everyone in the Acacia Study Group over the past year. We never run out of material and there are many ideas yet to be implemented in future newsletters. Also a From the Leader 1 special thanks to Bill Aitchison who keeps everything up to Welcome 2 date and running smoothly, making sure I don’t forget anything in my hectic schedule and also for putting up with Boost for Acacia Research in Aust. 2 me. Old Study Group Newsletters 2 Feature Plant – Acacia dealbata 2 Now it is also that time of year once again, end of financial Some Acacias from the Darling Downs 5 year, when subscriptions and reports are due. Some Wattles and Tourism in Dalwallinu 5 members have paid for a number of years so they don’t need Acacia tumida and Chooks 6 to worry. Others will have the renewal notice sent to them Acacia retinodes 7 with this newsletter. To ensure prompt processing of Acacias and Allergies 8 renewals, please fill out all relevant details on your Wattles and Bushfires – A Case Study 10 subscription form. Note that receipts are not generally Wattle Day Association Activities 11 provided but may be requested to be sent with the next Wattle Day in Wangaratta 11 newsletter. The Acacia Name Change Debate 12 Books 12 Membership fees this year have increased a little which I’m Study Group Membership 13 sure everyone will understand. Our new fees are as follows: Email: $7 Hard copy: $10 O/seas hard copy: $20 From The Leader The financial report and fully updated seed list will be posted in the next newsletter. Dear Members, Once again, thank you for all the support and kind thoughts Out on the west side of Melbourne we have had a little rain that help to keep this study group running strong. and the suburbs have started to look greener again. A nice surprise for me this year is my Acacia cardiophylla being Cheers completely covered from top to toe in bright blossoms Esther Brueggemeier earlier than usual. Other wattles in my garden are heavy with bud and the gentle scent of winter with its icy temperatures and sunny blue skies is quite relaxing. Acacia Study Group Newsletter No. 101 Page 1 meters and develops a lovely straight stem with a Welcome wonderfully rounded crown. The bark is smooth grey, brown or rich dark brown to almost black and only becomes A special welcome to the following new members and corrugated at the base of old trunks with age. subscribers to the Newsletter: The name dealbata indirectly refers to the whitish Matt Cosgrove, Tamworth, NSW appearance of the branchlets and foliage. The leaves are Sam Frankel, Brunswick, Vic mostly bluish grey green or silvery with young foliage being Col and Joanne Wallace, Wilkesdale, Qld a soft velvety cream to golden colour. The flowers are Hunter Region Botanic Gardens, Heatherbrae, NSW highly perfumed ranging from yellow to bright yellow. Boost For Acacia Research in Australia Acacia research in Australia has been given a significant boost with the appointment of one of the world’s leading Acacia researchers, Dr Joe Miller, to a position where he will be in charge of the molecular systematics laboratory at the Centre for Plant Biodiversity Research at CSIRO Plant Industry in Canberra. Most recently, Dr Miller worked at the Department of Biological Sciences at the University of Iowa. Dr Miller’s transfer to Australia is exciting news and we Acacia dealbata ssp. dealbata, Photo Russell Best extend our best wishes to him and his family in their move Acacia dealbata occurs on the Great Divide (mainly to Australia. tablelands and foothills) from the Ben Lomond Range in northern New South Wales to the Grampians in western Victoria; it is also common in eastern Tasmania and is Old Study Group Newsletters naturalized in parts of southwest Western Australia and southern South Australia. Acacia dealbata has been Following our request in the previous Newsletter for copies introduced into many countries including Chile, China, of old Newsletters that we are missing in the Study Group France (and other parts of southern Europe), Ethiopia, India, Archives, we extend our thanks to SGAP Queensland for Japan, Kenya, Nepal, New Zealand, North Africa, South providing copies of some that we did not have. Africa, Sri Lanka, Uganda, West Africa, Zambia and Zimbabwe. Unfortunately many of these have become We are still missing the first 25 unnumbered newsletters, weed species due to their incredible suckering habit. and Newsletters 1 – 14, and 24. As a long lived, fast growing, vigorous species, Acacia dealbata copes extremely well in a range of topography If anyone can help with these missing newsletters, we from high plateaus to deep mountain valleys, often growing would be very grateful. on steep slopes, along stream banks and usually in dry sclerophyll forest or woodland. Soil types vary from deep, fertile forest soils, clays and gravelly clays of moderate Feature Plant – Acacia dealbata drainage to well-drained stony slopes, volcanic brown (Silver Wattle) earths and deep clay. Generally it is found at higher elevations than Acacia mearnsii and Acacia decurrens. by Esther Brueggemeier Taxonomy Acacia dealbata comprises two subspecies. That is Distribution and Habit subspecies dealbata and subspecies subalpina. Subspecies Acacia dealbata is a bushy shrub or beautiful tree that can subalpina is generally distinguished by its smaller leaves be utilised in many ways. Generally it grows from 2 to 15 and smaller stature and often brighter yellow flower-heads meters and can be multi-stemmed although in wetter climate with fewer flowers. Subspecies subalpina occurs mainly at forests and along watercourses it reaches an amazing 30 higher altitudes and is common on the Snowy Mountains. Acacia Study Group Newsletter No. 101 Page 2 According to the world wide wattle website, “Intermediates 'nurse crop' for use with slow growing eucalypts or other between them are common in areas where subsp. dealbata long-lived species in mixed woodlots. occupies the lower mountain slopes and subsp. subalpina Wildlife dependence on Acacia dealbata is considerably the upper slopes. (See the table at end of article) Acacia high. Many marsupials depend on the silver wattle for its dealbata can also hybridise with Acacia decurrens, A, winter carbohydrates including the Leadbeater's possum, the baileyana, A. pataczekii, A. mearnsii and A. podalyriifolia. sugar glider, the squirrel glider, the mahogany glider and the Particularly in European gardens there have been some yellow-bellied glider. According to Smith & Lindenmayer interesting hybrids. One popular variety has been described (1992) the Acacia gum contributes up to 80% of the as Acacia x hanburyana. Leadbeater's possum's daily energy requirements. Acacia The most closely related species seem to be Acacia nano- dealbata is a valuable source of pollen for insects and bees. dealbata (dwarf silver wattle) and Acacia decurrens (green The young trees are also host to the 'Imperial Blue Butterfly' wattle/early black wattle) with the most obvious difference caterpillar. being the colour of the leaves, dark green rather than grey Aborigines had many uses for Acacia dealbata. The wood green. was used for making boomerangs and axe handles. Gum Amongst these species there is also a lush prostrate cultivar, was for food, including medicinal purposes and also used 'Kambah Karpet'. This selection was made in 1982 from a as an adhesive. The European settlers quickly learned from mature plant growing in a garden bed near the Health the knowledge of the indigenous people to use bark Centre in the Canberra suburb of Kambah by Mr. R.B. infusions in hot water as a remedy for indigestion and Hadlow of the staff of the Australian Botanic Gardens. dissolve the gum in boiling milk to take for dysentery and diarrhoea, with good results. In southern Europe Acacia dealbata is known as 'mimosa' and used commercially in the cut flower trade. The flowers are particularly valued in France for the production of perfume as the extract is recognised as a blender and 'smoothing agent' in high grade perfume. Acacia dealbata is now used as excellent fine timber for furniture designers and manufacturers. The wood varies in colour from light brown to subtle pink with distinctive growth rings, creating an appealing stripped pattern when backsawn. The wood is fairly tough, available in both solid and veneer. When planed and dressed, it produces a very smooth surface for furniture and polishes beautifully. As one of the softer hardwoods that glues and pulps well it is also used as good quality pulpwood in Tasmania producing high grade paper and paperboard products. A low growing form of A. dealbata, at Maranoa Garden, The silver wattle is an excellent fire retardant and studies Melbourne, Photo Bill Aitchison are continuing in this field. (See also n/l 100, Wattles and Bushfires by Alan Gray). Cultivation Notes Utilisation Acacia dealbata tolerates a wide range of soil types and Acacia dealbata is used in controlling soil erosion because frosty conditions making it a much loved fast growing of its excellent drought tolerant and root suckering specimen tree. This species grows best in cool climates but properties. It has been used extensively for hillside is also drought resistant regenerating easily from seed or stabilisation, gully erosion control and for windbreaks.
Recommended publications
  • (Hymenoptera: Eurytomidae) in the Integrated Control of Acacia Species in South Africa

    (Hymenoptera: Eurytomidae) in the Integrated Control of Acacia Species in South Africa

    Proceedings of the X International Symposium on Biological Control of Weeds 919 4-14 July 1999, Montana State University, Bozeman, Montana, USA Neal R. Spencer [ed.]. pp. 919-929 (2000) The Potential Role of Bruchophagus acaciae (Cameron) (Hymenoptera: Eurytomidae) in the Integrated Control of Acacia Species in South Africa R. L. HILL1, A. J. GORDON2, and S. NESER3 1Richard Hill & Associates, Private Bag 4704, Christchurch, New Zealand 2Plant Protection Research Institute, Private Bag X5017, Stellenbosch, 7599 South Africa 3Plant Protection Research Institute, Private Bag X134, Pretoria, 0001 South Africa Abstract Australian acacias invade watersheds and riverbeds in South Africa, reducing water flows and threatening environmental and economic values. Acacia mearnsii is the most widespread and important weed but also forms the basis of an important industry. A. dealbata, and to a lesser extent A. decurrens are also problems. All belong to the Section Botrycephalae of the sub-genus Heterophyllum. Short term control is achieved locally by removing plants, and by using herbicides, but seed-feeding control agents may provide an acceptable solution in the long term. Larvae of Bruchophagus acaciae (Cameron) (Hymenoptera: Eurytomidae) develop in the seeds of acacias. It was described from New Zealand, but is an Australian species. We explore whether B. acaciae has a role as a con- trol agent for acacias in South Africa. Seed was collected from 28 Australian species of Acacia growing in New Zealand. Attack was restricted to four of the seven species with- in the Section Botrycephalae, and two cases of attack on Acacia rubida (Section Phyllodineae; n=9). Apart from a wasp reared from one seed, A.
  • Wattles of the City of Whittlesea

    Wattles of the City of Whittlesea

    Wattles of the City of Whittlesea PROTECTING BIODIVERSITY ON PRIVATE LAND SERIES Wattles of the City of Whittlesea Over a dozen species of wattle are indigenous to the City of Whittlesea and many other wattle species are commonly grown in gardens. Most of the indigenous species are commonly found in the forested hills and the native forests in the northern parts of the municipality, with some species persisting along country roadsides, in smaller reserves and along creeks. Wattles are truly amazing • Wattles have multiple uses for Australian plants indigenous peoples, with most species used for food, medicine • There are more wattle species than and/or tools. any other plant genus in Australia • Wattle seeds have very hard coats (over 1000 species and subspecies). which mean they can survive in the • Wattles, like peas, fix nitrogen in ground for decades, waiting for a the soil, making them excellent cool fire to stimulate germination. for developing gardens and in • Australia’s floral emblem is a wattle: revegetation projects. Golden Wattle (Acacia pycnantha) • Many species of insects (including and this is one of Whittlesea’s local some butterflies) breed only on species specific species of wattles, making • In Victoria there is at least one them a central focus of biodiversity. wattle species in flower at all times • Wattle seeds and the insects of the year. In the Whittlesea attracted to wattle flowers are an area, there is an indigenous wattle important food source for most bird in flower from February to early species including Black Cockatoos December. and honeyeaters. Caterpillars of the Imperial Blue Butterfly are only found on wattles RB 3 Basic terminology • ‘Wattle’ = Acacia Wattle is the common name and Acacia the scientific name for this well-known group of similar / related species.
  • Acacia Mearnsii) in the Tsomo Valley in Eastern Cape: Consequences on the Water Recharge and Soil Dynamics (An Ongoing Study)

    Acacia Mearnsii) in the Tsomo Valley in Eastern Cape: Consequences on the Water Recharge and Soil Dynamics (An Ongoing Study)

    Grassroots: Newsletter of the Grassland Society of Southern Africa ▪ May 2009 ▪ Vol. 9 ▪ No. 2 Impact of the removal of black wattle (Acacia mearnsii) in the Tsomo Valley in Eastern Cape: Consequences on the water recharge and soil dynamics (an ongoing study) HPM Moyo, S Dube and AO Fatunbi Department of Livestock and Pasture Sciences, University of Fort Hare Email: [email protected] lack wattle (Acacia mearnsii) (Galatowitsch and Richardson is a fast growing leguminous 2004). Acacia mearnsii ranks first in B (nitrogen fixing) tree and it is water use among invasive species, often used as a commercial source using 25% of the total amount, and of tannins and a source of fire wood is estimated to reduce mean annual for local communities (DWAF 1997). runoff by 7% in South Africa (Dye Riparian ecosystems are widely re- and Jarmain 2004). The invasive garded as being highly prone to in- ability of this species is partly due to vasion by alien plants, especially A. its ability to produce large numbers mearnsii, largely because of their of long-lived seeds (which may be dynamic hydrology, nutrient levels, triggered to germinate by fires) and and ability to disperse propagules the development of a large crown (Galatowitsch and Richardson that shades other vegetation (Nyoka 2004). Disturbing native vegetation 2003). also causes invasion as this often Acacia mearnsii threatens na- prepares a seed bed for invader spe- tive habitats by competing with in- cies (DWAF 1997). Native fynbos digenous vegetation, replacing grass tree species lack mycorrhyzal asso- communities; reducing native biodi- ciates and therefore are less efficient versity and increasing water loss at nutrient uptake (Smita 1998), from the riparian zones (Nyoka leading to them being out-competed 2003).
  • Acacia Saligna RA

    Acacia Saligna RA

    Risk Assessment: ………….. ACACIA SALIGNA Prepared by: Etienne Branquart (1), Vanessa Lozano (2) and Giuseppe Brundu (2) (1) [[email protected]] (2) Department of Agriculture, University of Sassari, Italy [[email protected]] Date: first draft 01 st November 2017 Subsequently Reviewed by 2 independent external Peer Reviewers: Dr Rob Tanner, chosen for his expertise in Risk Assessments, and Dr Jean-Marc Dufor-Dror chosen for his expertise on Acacia saligna . Date: first revised version 04 th January 2018, revised in light of comments from independent expert Peer Reviewers. Approved by the IAS Scientific Forum on 26/10/2018 1 2 3 4 5 6 7 1 Branquart, Lozano & Brundu PRA Acacia saligna 8 9 10 Contents 11 Summary of the Express Pest Risk Assessment for Acacia saligna 4 12 Stage 1. Initiation 6 13 1.1 - Reason for performing the Pest Risk Assessment (PRA) 6 14 1.2 - PRA area 6 15 1.3 - PRA scheme 6 16 Stage 2. Pest risk assessment 7 17 2.1 - Taxonomy and identification 7 18 2.1.1 - Taxonomy 7 19 2.1.2 - Main synonyms 8 20 2.1.3 - Common names 8 21 2.1.4 - Main related or look-alike species 8 22 2.1.5 - Terminology used in the present PRA for taxa names 9 23 2.1.6 - Identification (brief description) 9 24 2.2 - Pest overview 9 25 2.2.2 - Habitat and environmental requirements 10 26 2.2.3 Resource acquisition mechanisms 12 27 2.2.4 - Symptoms 12 28 2.2.5 - Existing PRAs 12 29 Socio-economic benefits 13 30 2.3 - Is the pest a vector? 14 31 2.4 - Is a vector needed for pest entry or spread? 15 32 2.5 - Regulatory status of the pest 15 33 2.6 - Distribution
  • Human-Mediated Introductions of Australian Acacias

    Human-Mediated Introductions of Australian Acacias

    Diversity and Distributions, (Diversity Distrib.) (2011) 17, 771–787 S EDITORIAL Human-mediated introductions of PECIAL ISSUE Australian acacias – a global experiment in biogeography 1 2 1 3,4 David M. Richardson *, Jane Carruthers , Cang Hui , Fiona A. C. Impson , :H Joseph T. Miller5, Mark P. Robertson1,6, Mathieu Rouget7, Johannes J. Le Roux1 and John R. U. Wilson1,8 UMAN 1 Centre for Invasion Biology, Department of ABSTRACT - Botany and Zoology, Stellenbosch University, MEDIATED INTRODUCTIONS OF Aim Australian acacias (1012 recognized species native to Australia, which were Matieland 7602, South Africa, 2Department of History, University of South Africa, PO Box previously grouped in Acacia subgenus Phyllodineae) have been moved extensively 392, Unisa 0003, South Africa, 3Department around the world by humans over the past 250 years. This has created the of Zoology, University of Cape Town, opportunity to explore how evolutionary, ecological, historical and sociological Rondebosch 7701, South Africa, 4Plant factors interact to affect the distribution, usage, invasiveness and perceptions of a Protection Research Institute, Private Bag globally important group of plants. This editorial provides the background for the X5017, Stellenbosch 7599, South Africa, 20 papers in this special issue of Diversity and Distributions that focusses on the 5Centre for Australian National Biodiversity global cross-disciplinary experiment of introduced Australian acacias. A Journal of Conservation Biogeography Research, CSIRO Plant Industry, GPO Box Location Australia and global. 1600, Canberra, ACT, Australia, 6Department of Zoology and Entomology, University of Methods The papers of the special issue are discussed in the context of a unified Pretoria, Pretoria 0002, South Africa, framework for biological invasions.
  • Environmental Weeds, Adelaide Region

    Environmental Weeds, Adelaide Region

    Sustainable Landscapes Project Interim integrated weed list for the greater Adelaide region incorporating: • Weeds of National Significance • SA Urban Forest Biodiversity Program environmental weed list • CRC for Australian Weed Management factsheet: Alternatives to invasive garden plants, Greater Adelaide Region 2004 • CSIRO ten most serious invasive garden plants for sale in South Australia # Many of the plants in the following list may not cause problems if properly contained, but when planted or dumped near remant native vegetation can easily escape and become invasive. We recommend that these plants only be planted in areas where they do not cause problems, and even then that they be carefully maintained and monitored. Plant species common as environmental weeds of the Adelaide region * non-native (exotic) species ** proclaimed species # CSIRO invasive Trees and tall shrubs Common name Scientific name Where it is a problem Cootamundra wattle Acacia baileyana hills silver wattle Acacia dealbata hills early black wattle Acacia decurrens hills Flinders Ranges wattle Acacia iteaphylla Acacia longifolia var. hills sallow wattle longifolia # golden wreath wattle Acacia saligna all areas tree of heaven *Ailanthus altissima plains, hills Irish strawberry tree *Arbutus unedo hills tree lucerne / tagasaste *Chamaecytisus palmensis plains, hills, creek cotoneaster *Cotoneaster spp. creek, hills May hawthorn *Crataegus monogyna creek, hills ** azzarola Crataegus sinaica creek, hills *Fraxinus angustifolia ssp. creek, hills # desert ash oxycarpa pincushion hakea Hakea laurina hills tree tobacco *Nicotiana glauca all areas ** # olive *Olea europaea all areas (Olives can be grown for agricultural purposes) Cape Leeuwin wattle Paraserianthes lophantha creek, hills, coast ** # Aleppo pine *Pinus halepensis plains, hills,mallee radiata pine *Pinus radiata hills sweet pittosporum Pittosporum undulatum plains, hills, creek myrtle-leaf milkwort *Polygala myrtifolia hills, coast poplar *Populus spp.
  • Allelopathic Effect of the Invasive Acacia Dealbata Link (Fabaceae) on Two Native Plant Species in South-Central Chile

    Allelopathic Effect of the Invasive Acacia Dealbata Link (Fabaceae) on Two Native Plant Species in South-Central Chile

    Gayana Bot. 72(2): 231-239, 2015 ISSN 0016-5301 Allelopathic effect of the invasive Acacia dealbata Link (Fabaceae) on two native plant species in south-central Chile Efecto alelopático de la invasora Acacia dealbata Link (Fabaceae) en dos especies de plantas nativas del centro-sur de Chile NARCISO AGUILERA1,2, JOSÉ BECERRA2, LUBIA M. GUEDES2, CRISTOBAL VILLASEÑOR-PARADA3,4, LUIS GONZÁLEZ5 & VÍCTOR HERNÁNDEZ2 1Departamento de Silvicultura, Facultad de Ciencias Forestales, Universidad de Concepción, Casilla 160-C, Concepción, Chile. 2Laboratorio de Química de Productos Naturales, Depart amento de Botánica Universidad de Concepción, Facultad de Ciencias Naturales y Oceanográficas, Casilla 160-C, Concepción, Chile. 3Laboratorio de Invasiones Biológicas (LIB), Facultad de Ciencias Forestales, Universidad de Concepción, Concepción, Chile. 4Instituto de Ecología y Biodiversidad (IEB), Casilla 653, Santiago, Chile. 5Departamento Bioloxía Vexetal e Ciencia do Solo, Facultade de Ciencias del Mar, Universidad de Vigo, As Lagoas Marcosende 36310 Vigo, España. *[email protected] ABSTRACT Plant species that growth close to or under the canopy of Acacia dealbata Link (Fabaceae, subfamily: Mimosoideae) within its non-native range, survive with difficulty or not at all, especially if they are native. This phenomenon has been attributed to allelopathy; one of the strategies used by A. dealbata to trigger an invasion process. Native species Quillaja saponaria Molina (tree) and Helenium aromaticum (Hook.) H.L. Bailey (herb), share A. dealbata’s range in South-central Chile. This study was performed on the Mediterranean Biobío Region of Chile. We evaluated the effect of leaves, flowers, pods and seeds of A. dealbata on the germination and early growth of these native species.
  • Indigenous Plants of Bendigo

    Indigenous Plants of Bendigo

    Produced by Indigenous Plants of Bendigo Indigenous Plants of Bendigo PMS 1807 RED PMS 432 GREY PMS 142 GOLD A Gardener’s Guide to Growing and Protecting Local Plants 3rd Edition 9 © Copyright City of Greater Bendigo and Bendigo Native Plant Group Inc. This work is Copyright. Apart from any use permitted under the Copyright Act 1968, no part may be reproduced by any process without prior written permission from the City of Greater Bendigo. First Published 2004 Second Edition 2007 Third Edition 2013 Printed by Bendigo Modern Press: www.bmp.com.au This book is also available on the City of Greater Bendigo website: www.bendigo.vic.gov.au Printed on 100% recycled paper. Disclaimer “The information contained in this publication is of a general nature only. This publication is not intended to provide a definitive analysis, or discussion, on each issue canvassed. While the Committee/Council believes the information contained herein is correct, it does not accept any liability whatsoever/howsoever arising from reliance on this publication. Therefore, readers should make their own enquiries, and conduct their own investigations, concerning every issue canvassed herein.” Front cover - Clockwise from centre top: Bendigo Wax-flower (Pam Sheean), Hoary Sunray (Marilyn Sprague), Red Ironbark (Pam Sheean), Green Mallee (Anthony Sheean), Whirrakee Wattle (Anthony Sheean). Table of contents Acknowledgements ...............................................2 Foreword..........................................................3 Introduction.......................................................4
  • South East 154 October 2019.Pdf

    South East 154 October 2019.Pdf

    Australian Plants Society South East NSW Group Newsletter 154 October 2019 Corymbia maculata Spotted Gum and Contac ts: President, Dianne Clark, [email protected] Macrozamia communis Burrawang Secretary, Paul Hattersley [email protected] Newsletter editor, John Knight, [email protected] Group contact [email protected] Next Meeting Saturday 2nd November 2019 Plants and Vegetation of Montague Island At ERBG Staff Meeting Room 10am Paul Hattersley, APS Member and also a Volunteer Guide for Montague Island, had originally proposed to lead a tour onto the island to discuss relevant conservation issues. However, as insufficient members expressed interest in taking the boat trip, this had to be cancelled, and likewise therefore, the planned activities at Narooma. Plans for our next meeting have now changed and we will meet at ERBG staff meeting room at 10am for morning tea, followed by a presentation by Paul at 10.30am: "The plants and vegetation of Montague Island, seabird conservation, and the impacts of weeds and other human disturbance and activity". The history and heritage of Montague Island, including the light station, will also be weaved into the talk. Paul apologises to those who wanted to join the field trip on Montague Island, but with low numbers the economics of hiring the boat proved unviable. Following Paul’s presentation, we will conduct the Show and Tell session (please bring your garden plants in flower) and after lunch, open discussion, end of year notices, and a walk at gardens to see what has happened over the past 12 months. Members might consider dining at the Chefs Cap Café, recently opened in its new location by the lakeside.
  • Rare Or Threatened Vascular Plant Species of Wollemi National Park, Central Eastern New South Wales

    Rare Or Threatened Vascular Plant Species of Wollemi National Park, Central Eastern New South Wales

    Rare or threatened vascular plant species of Wollemi National Park, central eastern New South Wales. Stephen A.J. Bell Eastcoast Flora Survey PO Box 216 Kotara Fair, NSW 2289, AUSTRALIA Abstract: Wollemi National Park (c. 32o 20’– 33o 30’S, 150o– 151oE), approximately 100 km north-west of Sydney, conserves over 500 000 ha of the Triassic sandstone environments of the Central Coast and Tablelands of New South Wales, and occupies approximately 25% of the Sydney Basin biogeographical region. 94 taxa of conservation signiicance have been recorded and Wollemi is recognised as an important reservoir of rare and uncommon plant taxa, conserving more than 20% of all listed threatened species for the Central Coast, Central Tablelands and Central Western Slopes botanical divisions. For a land area occupying only 0.05% of these divisions, Wollemi is of paramount importance in regional conservation. Surveys within Wollemi National Park over the last decade have recorded several new populations of signiicant vascular plant species, including some sizeable range extensions. This paper summarises the current status of all rare or threatened taxa, describes habitat and associated species for many of these and proposes IUCN (2001) codes for all, as well as suggesting revisions to current conservation risk codes for some species. For Wollemi National Park 37 species are currently listed as Endangered (15 species) or Vulnerable (22 species) under the New South Wales Threatened Species Conservation Act 1995. An additional 50 species are currently listed as nationally rare under the Briggs and Leigh (1996) classiication, or have been suggested as such by various workers. Seven species are awaiting further taxonomic investigation, including Eucalyptus sp.
  • How Does Genome Size Affect the Evolution of Pollen Tube Growth Rate, a Haploid Performance Trait?

    How Does Genome Size Affect the Evolution of Pollen Tube Growth Rate, a Haploid Performance Trait?

    Manuscript bioRxiv preprint doi: https://doi.org/10.1101/462663; this version postedClick April here18, 2019. to The copyright holder for this preprint (which was not certified by peer review) is the author/funder, who has granted bioRxiv aaccess/download;Manuscript;PTGR.genome.evolution.15April20 license to display the preprint in perpetuity. It is made available under aCC-BY-NC-ND 4.0 International license. 1 Effects of genome size on pollen performance 2 3 4 5 How does genome size affect the evolution of pollen tube growth rate, a haploid 6 performance trait? 7 8 9 10 11 John B. Reese1,2 and Joseph H. Williams2 12 Department of Ecology and Evolutionary Biology, University of Tennessee, Knoxville, TN 13 37996, U.S.A. 14 15 16 17 1Author for correspondence: 18 John B. Reese 19 Tel: 865 974 9371 20 Email: [email protected] 21 1 bioRxiv preprint doi: https://doi.org/10.1101/462663; this version posted April 18, 2019. The copyright holder for this preprint (which was not certified by peer review) is the author/funder, who has granted bioRxiv a license to display the preprint in perpetuity. It is made available under aCC-BY-NC-ND 4.0 International license. 22 ABSTRACT 23 Premise of the Study – Male gametophytes of most seed plants deliver sperm to eggs via a 24 pollen tube. Pollen tube growth rates (PTGRs) of angiosperms are exceptionally rapid, a pattern 25 attributed to more effective haploid selection under stronger pollen competition. Paradoxically, 26 whole genome duplication (WGD) has been common in angiosperms but rare in gymnosperms.
  • Acacia Decora Rchb

    Acacia Decora Rchb

    WATTLE Acacias of Australia Acacia decora Rchb. Source: Australian Plant Image Index (dig.1960). Source: Australian Plant Image Index (dig.1961). ANBG © M. Fagg, 2006 ANBG © M. Fagg, 2006 Source: Australian Plant Image Index Source: Australian Plant Image Index (dig.23069). (dig.23070). ANBG © M. Fagg, 2012 ANBG © M. Fagg, 2012 Source: W orldW ideW attle ver. 2. Source: Australian Plant Image Index Published at: w w w .w orldw idew attle.com (dig.32777). B.R. Maslin ANBG © M. Fagg, 2014 Source: Australian Plant Image Index Source: Australian Plant Image Index (dig.29608). (dig.29609). ANBG © M. Fagg, 2012 ANBG © M. Fagg, 2012 Source: W orldW ideW attle ver. 2. Source: Australian Plant Image Index Source: Australian Plant Image Index Published at: w w w .w orldw idew attle.com (dig.25581). Source: Australian Plant Image Index (dig.29610). B.R. Maslin ANBG © M. Fagg, 2012 (dig.27164). ANBG © M. Fagg, 2012 ANBG © M. Fagg, 2012 Source: Australian Plant Image Index Source: Australian Plant Image Index (dig.29612). (dig.32780). ANBG © M. Fagg, 2012 ANBG © M. Fagg, 2014 Source: Australian Plant Image Index Source: Australian Plant Image Index (dig.29611). (dig.32778). ANBG © M. Fagg, 2012 ANBG © M. Fagg, 2014 Source: W orldW ideW attle ver. 2. Source: W orldW ideW attle ver. 2. Source: W orldW ideW attle ver. 2. Published at: w w w .w orldw idew attle.com Published at: w w w .w orldw idew attle.com Published at: w w w .w orldw idew attle.com See illustration. See illustration. See illustration. Source: Australian Plant Image Index (a.31026).