Callitris Rhomboidea

Plants of South Eastern New South Wales Male cones, mature cones, and leaves. Australian Plant Image Index, photographer Murray Fagg, Australian National Botanic Gardens, Canberra, ACT Trees. Australian Plant Image Index, photographer Mark Clements, unknown site Line drawings. JH Maiden (1902-1925) Forest Flora of NSW Common name Port Jackson pine, Oyster Bay pine Family Cupressaceae Where found Forest and woodland. Coast and ranges. Eastern part of the tablelands north of the Great Western Highway. Notes Tree or shrub to 12 m high, with spreading branches. Bark occasionally becoming rough and fissured on larger trees. Stems rounded triangular, grooved longitudinally, hairless, at first glaucous. Leaves aromatic when rubbed, 0.1–0.7 cm long, in whorls of 3 or 4, at first glaucous, bluish green or green, scale-like, keeled on the back, the bases appressed to the branchlets, giving the stem an angular appearance. Juvenile leaves more or less free from the branches, in whorls of 3-5, needle-like. Male and female cones on the same tree. Male cones at the ends of the branches, about 3 mm long, single or clustered. Female cones usually clustered on short fruiting branches, remaining long after maturity. Mature female cones woody, globular to depressed-globular, 10-25 mm in diameter when open. Cone scales thick, larger alternate scales broader above and abruptly angled into a short wide tip. Alternate scales smaller. Seeds numerous, dark brown; wings 2 or 3, about 1 mm wide. PlantNET description: http://plantnet.rbgsyd.nsw.gov.au/cgi-bin/NSWfl.pl? page=nswfl&lvl=sp&name=Callitris~rhomboidea (accessed 7 January, 2021) Author: Betty Wood. This identification key and fact sheets are available as a free mobile application: Android edition iOS edition Creative Commons Attribution 3.0 Australia (CC BY).

Copy Link

Recommended publications

Towards Land Cover Classification in Australia
Classifying Australian land cover C. Atyeo and R. Thackway December 2006 © Commonwealth of Australia 2006 This work is copyright. Apart from any use as permitted under the Copyright Act 1968, no part may be reproduced by any process without prior written permission from the Commonwealth. Requests and inquiries concerning reproduction and rights should be addressed to the Commonwealth Copyright Administration, Attorney General’s Department, Robert Garran Offices, National Circuit, Barton ACT 2600 or posted at http://www.ag.gov.au/cca. The Australian Government acting through the Bureau of Rural Sciences has exercised due care and skill in the preparation and compilation of the information and data set out in this publication. Notwithstanding, the Bureau of Rural Sciences, its employees and advisers disclaim all liability, including liability for negligence, for any loss, damage, injury, expense or cost incurred by any person as a result of accessing, using or relying upon any of the information or data set out in this publication to the maximum extent permitted by law. Postal address: Bureau of Rural Sciences GPO Box 858 Canberra, ACT 2601 Copies available from: BRS Publication Sales GPO Box 858 Canberra ACT 2601 Ph: 1800 020 157 Fax: 02 6272 2330 Email: [email protected] Internet: http://www.brs.gov.au ii Acknowledgments The authors wish to thank the State and Territory representatives on the National Vegetation Information System Technical Advisory Group and the Executive Steering Committee for Australian Vegetation Information for endorsing the need to take a whole- of-landscape approach to translating and compiling native, non-native and non-vegetated cover types as part of the National Vegetation Information System framework.
[Show full text]
Fire Retardant Plants for the Urban Fringe and Rural Areas
Flammability Groups Leptospermum scoparium TN Pittosporum undulatum AN X Cucurbita maxima E Pumpkin Morus sp. E Mulberry Manuka, Teatree Sweet Pittosporum Cymbopogon citratus E Lemon Grass Myoporum insulare AN Boobyalla In the following list E denotes an exotic plant, TN a plant Lomandra longifolia TN Saggs Platanus x acerifolia E Plane Tree Cyphomandra betacea E Tamarillo Nerium oleander E Oleander native to Tasmania, AN a plant native to mainland Australia Melaleuca alternifolia AN Paperbark Poa sp. AN Poa Grass Delonix regia E Poinciana Olearia argophylla TN Musk Monstera deliciosa E Monstera Populas sp. E Poplar and X a known environmental weed. Dicksonia antarctica TN Man Fern Photinia glabra var. rubens E Nadina domestica E Sacred Bamboo Quercus robur E English oak Diospryros sp. E Persimmon Chinese Fire Bush or Red-leafed Photinia High Flammability Nicotiana glauca AN Tobacco Bush Spiraea catoniensis E May Eriobotrya japonica E Loquat Pittosporum bicolor TN Cheesewood Pinus elliottii E Tasmannia lanceolata TN Escallonia macrantha E Escallonia These plants have been shown to be highly flammable and Slash or Elliott’s Pine Native Pepper Pteridium esculentum TN Euryops pectinatus E Bracken Fern should not be planted or allowed to remain inside your house’s Pinus patula E Ulex europaeus E X Gorse Yellow Daisy Bush Mexican or Weeping Pine Rhododendron sp. E Rhododendron Building Protection Zone. They should also be avoided in the Viburnum opulus E Guelder Rose Genista monspessulana E X Montpellier Broom Rosa sp. E X Roses, Briars Fuel Modified Zone. Move these plants away from your house Moderate Flammability Koelreuteria paniculata E Salix babylonica E Weeping Willow and replace them with less flammable plants.
[Show full text]
Aridity Drove the Evolution of Extreme Embolism Resistance and The
Aridity drove the evolution of extreme embolism resistance and the radiation of conifer genus Callitris Maximilian Larter, Sebastian Pfautsch, Jean-Christophe Domec, Santiago Trueba, Nathalie Nagalingum, Sylvain Delzon To cite this version: Maximilian Larter, Sebastian Pfautsch, Jean-Christophe Domec, Santiago Trueba, Nathalie Na- galingum, et al.. Aridity drove the evolution of extreme embolism resistance and the radiation of conifer genus Callitris. New Phytologist, Wiley, 2017, 215 (1), pp.97-112. 10.1111/nph.14545. hal-01606790 HAL Id: hal-01606790 https://hal.archives-ouvertes.fr/hal-01606790 Submitted on 19 Nov 2019 HAL is a multi-disciplinary open access L’archive ouverte pluridisciplinaire HAL, est archive for the deposit and dissemination of sci- destinée au dépôt et à la diffusion de documents entific research documents, whether they are pub- scientifiques de niveau recherche, publiés ou non, lished or not. The documents may come from émanant des établissements d’enseignement et de teaching and research institutions in France or recherche français ou étrangers, des laboratoires abroad, or from public or private research centers. publics ou privés. Distributed under a Creative Commons Attribution - ShareAlike| 4.0 International License Research Aridity drove the evolution of extreme embolism resistance and the radiation of conifer genus Callitris Maximilian Larter1, Sebastian Pfautsch2, Jean-Christophe Domec3,4, Santiago Trueba5,6, Nathalie Nagalingum7 and Sylvain Delzon1 1BIOGECO, INRA, Univ. Bordeaux, Pessac 33610, France; 2Hawkesbury Institute for the Environment, Western Sydney University, Locked Bag 1797, Penrith, NSW 2751, Australia; 3Bordeaux Sciences AGRO, UMR 1391 ISPA INRA, 1 Cours du General de Gaulle, Gradignan Cedex 33175, France; 4Nicholas School of the Environment, Duke University, Durham, NC 27708, USA; 5Department of Ecology and Evolutionary Biology, University of California, Los Angeles, UCLA, 621 Charles E.
[Show full text]
The Evolution of Cavitation Resistance in Conifers Maximilian Larter
The evolution of cavitation resistance in conifers Maximilian Larter To cite this version: Maximilian Larter. The evolution of cavitation resistance in conifers. Bioclimatology. Univer- sitéde Bordeaux, 2016. English. <NNT : 2016BORD0103>. <tel-01375936> HAL Id: tel-01375936 https://tel.archives-ouvertes.fr/tel-01375936 Submitted on 3 Oct 2016 HAL is a multi-disciplinary open access L'archive ouverte pluridisciplinaire HAL, est archive for the deposit and dissemination of sci- destinéeau dépôtet àla diffusion de documents entific research documents, whether they are pub- scientifiques de niveau recherche, publiésou non, lished or not. The documents may come from émanant des établissements d'enseignement et de teaching and research institutions in France or recherche fran¸caisou étrangers,des laboratoires abroad, or from public or private research centers. publics ou privés. THESE Pour obtenir le grade de DOCTEUR DE L’UNIVERSITE DE BORDEAUX Spécialité : Ecologie évolutive, fonctionnelle et des communautés Ecole doctorale: Sciences et Environnements Evolution de la résistance à la cavitation chez les conifères The evolution of cavitation resistance in conifers Maximilian LARTER Directeur : Sylvain DELZON (DR INRA) Co-Directeur : Jean-Christophe DOMEC (Professeur, BSA) Soutenue le 22/07/2016 Devant le jury composé de : Rapporteurs : Mme Amy ZANNE, Prof., George Washington University Mr Jordi MARTINEZ VILALTA, Prof., Universitat Autonoma de Barcelona Examinateurs : Mme Lisa WINGATE, CR INRA, UMR ISPA, Bordeaux Mr Jérôme CHAVE, DR CNRS, UMR EDB, Toulouse i ii Abstract Title: The evolution of cavitation resistance in conifers Abstract Forests worldwide are at increased risk of widespread mortality due to intense drought under current and future climate change.
[Show full text]
Highly Flammable Plants
HIGHLY FLAMMABLE PLANTS COMMON NAME SPECIES NAME NATIVE TO silver wattle Acacia dealbata NSW, VIC, TAS This plant list hop wattle Acacia stricta QLD, NSW, VIC, TAS, SA accompanies the prickly Moses Acacia verticillata NSW, VIC, TAS, SA article ‘In the line of fire: Garden design to lilly pilly Acmena smithii (syn. Syzygium smithii) QLD, NSW, VIC reduce the threat of rough-barked apple Angophora floribunda QLD, NSW, VIC bushfire’ in Sanctuary coast banksia Banksia integrifolia QLD, NSW, VIC magazine issue 51. silver banksia Banksia marginata NSW, VIC, SA, TAS sanctuary.renew.org.au crimson bottlebrush Callistemon citrinus QLD, NSW, VIC Port Jackson pine Callitris rhomboidea QLD, NSW, VIC, SA river she-oak Casuarina cunninghamiana QLD, NSW spotted gum Corymbia maculata QLD, NSW, VIC sticky hop bush Dodonaea viscosa All states and territories blueberry ash Elaeocarpus reticulatus QLD, NSW, VIC, TAS black peppermint Eucalyptus amygdalina TAS messmate stringybark Eucalyptus obliqua QLD, NSW, VIC, TAS, SA grey ironbark Eucalyptus paniculata NSW white peppermint Eucalyptus pulchella TAS manna gum Eucalyptus viminalis QLD, NSW, VIC, TAS, SA native cherry Exocarpos cupressiformis QLD, NSW, VIC, TAS, SA crow’s ash Flindersia australis QLD, NSW cutting grass Gahnia grandis NSW, VIC, TAS Text from The Poorinda cultivars Grevillea x poorinda Eastern Australia Waterwise Australian silky oak Grevillea robusta QLD, NSW Native Garden by Angus Stewart and AB rosemary grevillea Grevillea rosmarinifolia NSW, VIC Bishop, Murdoch Books, variable sword sedge
[Show full text]
HFNC Excursion to Serra Range South Trail to Mud-Dadjug (Mt Abrupt) on 20 March 2021
HFNC Excursion to Serra Range south trail to Mud-dadjug (Mt Abrupt) on 20 March 2021 Rod Bird Participants: Ross Simpson, Diane Luhrs & Rod Bird, Wendy & Peter McDonald, Sonya & Sam Duke, Yvonne Ingeme & Reto Zollinger, Janeen Samuel, Peter Hocking and Roger Thompson. We left Hamilton at 9.30 am, a later starting time that we will try this year for most of our excursions. Dunkeld was our first stop on this mild morning, to meet Ross, our leader for the day. Ross led us to the Gariwerd NP car park near the old Dunkeld water storage dam, off the Dunkeld Halls Gap Rd. The track to the car park was very rugged and a test for vehicles with low clearance. From this point one can take a trail SW to Bainggug (The Piccaninny) or another NE off that trail to Mud-dadjug (Mt Abrupt). The first part of the walk from the car park to the base of Mt Abrupt was an easy stroll through a woodland of Brown Stringybark (E. baxteri), Oyster Bay Pine (Callitris rhomboidea) and Austral Grass- tree (Xanthorrhoea australis). Black Wattle (A. mearnsii) was evident near the beginning. Heath shrubs, Common Fringed-myrtle (Calytrix tetragona), Manuka Tea-tree (Leptospermum scoparium), Wedge- leaved Hop-bush (Dodonaea cuneata), Dagger Hakea (Hakea teretifolia), Variable Prickly Grevillea (Grevillea aquifolium) and Silver Banksia (B. marginata), were prominent, along with the usual understorey species such as Common Flat-pea (Platylobium obtusangulum), Horny Conebush (Isopogon ceratophyllus), Flame Heath (Stenanthera conostephioides) and Golden Heath (Styphelia adscendens). Peaks Trail through woodland/heath Silver Banksia Flame Heath Ixodia Common Heath in white and pink 1 Plants in flower were rare (only a few flowers were seen on any species) – they included Ixodia (Ixodia archillaeoides), Common Heath (Epacris impressa), Beard Heath (Leucopogon sp.), Button Everlasting (Coronidium scorpioides), Flame Heath and Silver Banksia.
[Show full text]
Declining Hydraulic Efficiency As Transpiring Leaves Desiccate
T. J. Brodribb & N. M. Holbrook Plant, Cell and Environment (2006) 29, 2205–2215 doi: 10.1111/j.1365-3040.2006.01594.x Declining hydraulic efficiency as transpiring leaves desiccate: two types of response* TIM J. BRODRIBB1,2 & N. MICHELE HOLBROOK2 1Department of Plant Science, University of Tasmania, PO Box 252-55, TAS, Australia 7001, and 2Department of Organismic and Evolutionary Biology, Harvard University, 16 Divinity Avenue, Cambridge, MA, USA ABSTRACT between sites of water delivery and water loss while not interfering with light harvesting or the CO2 diffusion path- The conductance of transpiring leaves to liquid water (K ) leaf way. In most plants, these demands are met by a hierarchi- was measured across a range of steady-state leaf water cal branching network of veins that terminate in extremely potentials ( ). Manipulating the transpiration rate in Yleaf small xylem conduits, tens to hundreds of microns from the excised leaves enabled us to vary in the range 0.1 MPa Yleaf - sub-stomatal cavities where the bulk of evaporation takes to less than 1.5 MPa while using a flowmeter to monitor - place (Wylie 1943; Roth-Nebelsick et al. 2001). Current the transpiration stream. Employing this technique to mea- research suggests that this vascular arrangement generates sure how desiccation affects K in 19 species, including leaf a large resistance to water flow through leaves, representing lycophytes, ferns, gymnosperms and angiosperms, we found between 30 and 90% of the hydraulic resistance of the two characteristic responses. Three of the six angiosperm whole plant (Salleo, Nardini & Lo Gullo 1997; Nardini, species sampled maintained a steady maximum K while leaf Tyree & Salleo 2001; Sack et al.
[Show full text]
A Summary of the Published Data on Host Plants and Morphology of Immature Stages of Australian Jewel Beetles (Coleoptera: Buprestidae), with Additional New Records
University of Nebraska - Lincoln DigitalCommons@University of Nebraska - Lincoln Center for Systematic Entomology, Gainesville, Insecta Mundi Florida 3-22-2013 A summary of the published data on host plants and morphology of immature stages of Australian jewel beetles (Coleoptera: Buprestidae), with additional new records C. L. Bellamy California Department of Food and Agriculture, [email protected] G. A. Williams Australian Museum, [email protected] J. Hasenpusch Australian Insect Farm, [email protected] A. Sundholm Sydney, Australia, [email protected] Follow this and additional works at: https://digitalcommons.unl.edu/insectamundi Bellamy, C. L.; Williams, G. A.; Hasenpusch, J.; and Sundholm, A., "A summary of the published data on host plants and morphology of immature stages of Australian jewel beetles (Coleoptera: Buprestidae), with additional new records" (2013). Insecta Mundi. 798. https://digitalcommons.unl.edu/insectamundi/798 This Article is brought to you for free and open access by the Center for Systematic Entomology, Gainesville, Florida at DigitalCommons@University of Nebraska - Lincoln. It has been accepted for inclusion in Insecta Mundi by an authorized administrator of DigitalCommons@University of Nebraska - Lincoln. INSECTA MUNDI A Journal of World Insect Systematics 0293 A summary of the published data on host plants and morphology of immature stages of Australian jewel beetles (Coleoptera: Buprestidae), with additional new records C. L. Bellamy G. A. Williams J. Hasenpusch A. Sundholm CENTER FOR SYSTEMATIC ENTOMOLOGY, INC., Gainesville, FL Cover Photo. Calodema plebeia Jordan and several Metaxymorpha gloriosa Blackburn on the flowers of the proteaceous Buckinghamia celcissima F. Muell. in the lowland mesophyll vine forest at Polly Creek, Garradunga near Innisfail in northeastern Queensland.
[Show full text]
Identification Key to the Cypress Family (Cupressaceae)1
Feddes Repertorium 116 (2005) 1–2, 96–146 DOI: 10.1002/fedr.200411062 Weinheim, Mai 2005 Ruhr-Universität Bochum, Lehrstuhl für Spezielle Botanik, Bochum C. SCHULZ; P. KNOPF & TH. STÜTZEL Identification key to the Cypress family (Cupressaceae)1 With 11 Figures Summary Zusammenfassung The identification of Cupressaceae taxa, except for Bestimmungsschlüssel für die Familie der Cup- some local and easily distinguishable taxa, is diffi- ressaceae cult even for specialists. One reason for this is the lack of a complete key including all Cupressaceae Die Bestimmung von Cupressaceae-Taxa ist mit taxa, another reason is that diagnoses and descrip- Ausnahme einiger lokaler und leicht bestimmbarer tions are spread over several hundred publications Taxa schwierig, selbst für Spezialisten. Ein Grund, which are sometimes difficult to access. Based on warum es noch keinen vollständigen Bestimmungs- morphological studies of about 3/4 of the species and schlüssel mit allen Cupressaceae-Taxa gibt ist, dass a careful compilation of the most important descrip- die Sippen-Beschreibungen sich auf mehrere hundert tions of Cupressaceae, a first identification key for Publikationen verteilen, welche teilweise schwierig the entire Cypress family (Cupressaceae) could be zu beschaffen sind. Etwa 3/4 der Cupressaceae-Ar- set up. The key comprises any of the 30 genera, 134 ten wurden morphologisch untersucht und die wich- species, 7 subspecies, 38 varieties, one form and thus tigsten Beschreibungen zusammengefasst, daraus all 180 taxa recognized by FARJON (2001). The key wurde dann der erste vollständige Bestimmungs- uses mainly features of adult leaves, female cones schlüssel für Cupressaceae erstellt. Der Bestim- and other characters which are all relatively easy to mungsschlüssel enthält 30 Gattungen, 134 Arten, be used.
[Show full text]
Black Cypress-Pine (Callitris Endlicheri)
Black Cypress-pine Callitris endlicheri fire-sensitive vegetation recovery following high intensity bushfire Black Saturday Victoria 2009 – Natural values fire recovery program Heidi Zimmer, David Cheal, Ian Lunt, Glen Johnson Black Cypress-pine Callitris endlicheri fire-sensitive vegetation recovery following high intensity bushfire David Cheal Arthur Rylah Institute for Environmental Research Department of Sustainability and Environment PO Box 137, Heidelberg VIC 3084. Heidi Zimmer Arthur Rylah Institute for Environmental Research Current address: School of Biological Sciences, Faculty of Science, Monash University, Clayton, VIC 3800. Ian Lunt Institute for Land, Water and Society Charles Sturt University PO Box 789 Albury, NSW 2640. Glen Johnson Department of Sustainability and Environment 1 McKoy Street, Wodonga VIC 3690. This project is No. 10 of the program ‘Rebuilding Together’ funded by the Victorian and Commonwealth governments’ Statewide Bushfire Recovery Plan, launched October 2009. Published by the Victorian Government Department of Sustainability and Environment Melbourne, June 2012. © The State of Victoria Department of Sustainability and Environment 2012. This publication is copyright. No part may be reproduced by any process except in accordance with the provisions of the Copyright Act 1968. Authorised by the Victorian Government, 8 Nicholson Street, East Melbourne. Printed by Stream Solutions. Printed on recycled paper. ISBN 978-1-74287-541-5 (print) ISBN 978-1-74287-542-2 (online) For more information contact the DSE Customer Service Centre 136 186. Disclaimer This publication may be of assistance to you but the State of Victoria and its employees do not guarantee that the publication is without flaw of any kind or is wholly appropriate for your particular purposes and therefore disclaims all liability for any error, loss or other consequence which may arise from you relying on any information in this publication.
[Show full text]
MCBG Conifer Collection
Mendocino Coast Botanical Gardens Conifer Collection Plant List as of 9/1/2016 Scientific Name Common Name Family Location Abies delavayi var. forrestii SILVER FIR PINACEAE ADMINB Abies durangensis DURANGO FIR PINACEAE E-504 Abies fargesii FARGES' FIR PINACEAE E-504 Abies forrestii var. smithii FORREST FIR PINACEAE E-507 Abies grandis GRAND FIR PINACEAE NATURAL Abies koreana KOREAN FIR PINACEAE E-301, E-301A Abies koreana 'Blauer Eskimo' PINACEAE E-108 Abies lasiocarpa 'Glacier' PINACEAE E-310A Abies nebrodensis SILICIAN FIR PINACEAE E-301A Abies pinsapo var. marocana MOROCCAN FIR PINACEAE E-504 Abies recurvata var. ernestii CHIEN-LU FIR PINACEAE E-509 Abies vejarii VEJAR FIR PINACEAE E-504 Araucaria angustifolia PARANA PINE ARAUCARIACEAE E-504 Athrotaxis cupressoides SMOOTH TASMANIAN CEDAR TAXODIACEAE E-508 Athrotaxis selaginoides KING BILLY PINE TAXODIACEAE E-502 Callitris rhomboidea PORT JACKSON PINE CUPRESSACEAE E-501 Callitris sp. CUPRESSACEAE E-501 Cedrus atlantica ATLAS CEDAR PINACEAE ADMINB Cedrus deodara DEODOR CEDAR PINACEAE E-401 Cedrus deodara 'Bush's Electra' DEODOR CEDAR PINACEAE E-405 Cedrus deodara 'Descanso Dwarf' DEODOR CEDAR PINACEAE E-504 Cedrus deodara 'Emerald Falls' PINACEAE E-108 Cedrus deodara 'Pendula' WEEPING DEODOR CEDAR PINACEAE S-1 Cedrus libani 'Sargentii' CEDAR OF LEBANON PINACEAE E-310C Cedrus libani 'Taurus' PINACEAE E-109 Cedrus libani var. brevifolia CYPRUS CEDAR PINACEAE E-301 Cephalotaxus harringtonia 'Fastigiata' JAPANESE PLUM YEW CEPHALOTAXACEAE ADMINB Chamaecyparis obtusa HINOKI CYPRESS CUPRESSACEAE
[Show full text]
A New Classification and Linear Sequence of Extant Gymnosperms
Phytotaxa 19: 55–70 (2011) ISSN 1179-3155 (print edition) www.mapress.com/phytotaxa/ Article PHYTOTAXA Copyright © 2011 Magnolia Press ISSN 1179-3163 (online edition) A new classification and linear sequence of extant gymnosperms MAARTEN J.M. CHRISTENHUSZ1, JAMES L. REVEAL2, ALJOS FARJON3, MARTIN F. GARDNER4, ROBERT R. MILL4 & MARK W. CHASE5 1Botanical Garden and Herbarium, Finnish Museum of Natural History, Unioninkatu 44, University of Helsinki, 00014 Helsinki, Finland. E-mail: [email protected] 2L. H. Bailey Hortorium, Department of Plant Biology, 412 Mann Building, Cornell University, Ithaca, NY 14853-4301, U.S.A. 3Herbarium, Library, Art & Archives, Royal Botanic Gardens, Kew, Richmond, Surrey, England, TW9 3AB, U.K. 4Royal Botanic Garden Edingurgh, 20A Inverleith Row, Edinburgh, EH3 5LR,Scotland, U.K. 5Jodrell Laboratory, Royal Botanic Gardens, Kew, Richmond, Surrey, England, TW9 3DS, U.K. Abstract A new classification and linear sequence of the gymnosperms based on previous molecular and morphological phylogenetic and other studies is presented. Currently accepted genera are listed for each family and arranged according to their (probable) phylogenetic position. A full synonymy is provided, and types are listed for accepted genera. An index to genera assists in easy access to synonymy and family placement of genera. Introduction Gymnosperms are seed plants with an ovule that is not enclosed in a carpel, as is the case in angiosperms. The ovule instead forms on a leaf-like structure (perhaps homologous to a leaf), or on a scale or megasporophyll (homologous to a shoot) or on the apex of a (dwarf) shoot. Megasporophylls are frequently aggregated into compound structures that are often cone-shaped, hence the colloquial name for some of the group: conifers.
[Show full text]