DOCSLIB.ORG

Uncommon and Special Trees to Promote Diversity in Yards, Parks, and Open Spaces San Francisco Urban Forestry Council Updated A

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Uncommon and Special Trees to Promote Diversity in Yards, Parks, and Open Spaces San Francisco Urban Forestry Council Updated A Uncommon and Special Trees to Promote Diversity in Yards, Parks, and Open Spaces San Francisco Urban Forestry Council Updated August 2016 San Francisco has a unique climate with multiple microclimates, where our open spaces (including parks, private yards, and open spaces under federal jurisdiction, such as the Presidio) present an opportunity to plant a wide variety of trees that are not yet common here. Many of these trees are not well suited as street trees, because they cannot tolerate compacted soils or their canopies or root systems cannot easily adapt to fit within street-side infrastructure. The following list of trees are considered well-adapted to San Francisco’s climate and conditions, but are under-represented in our open spaces. They present an opportunity for experimentation and improving San Francisco’s urban forestry diversity. Though some of these species may be difficult to find, the Urban Forestry Council recommends considering these species to add diversity to the urban forest. To view many of these trees in person, visit the plant collections at the Botanical Gardens at Strybing Arboretum. Size Evergreen/ Species Notes Deciduous Small - Evergreen Acer laevigatum Broad crown; semi -weeping (smooth maple or Nepal Less than 20’ maple) tall at maturity Alectryon excelsus Broad crown; small red fruits. Moderate (titoki) growth speed Carpodetus serratus Endemic to New Zealand (marbleleaf) Cussonia spicata Dramatic foliage texture Elaeocarpus decipiens Upright habit; tiny white flowers; blue - (Japanese blueberry tree) black fruits Leptospermum scoparium Broad, low crown; pink flowers; often ‘Helene Strybing’ multi-trunked (New Zealand tea tree) Melaleuca ericifolia Broad, dense crown; covered in white (swamp paperbark) flowers in early summer; attractive whitish peeling bark Meryta sinclairii Round headed; bold foliage texture (puka) Sophora microphylla & Rounded crown; yellow flowers Sophora tetraptera. (kowhai) Pittosporum erioloma (Lord Upright, irregular pagoda shape Howe Island Pittosporum) Vitex lucens Broad crown; reddish flowers (New Zealand chaste tree) Small - Deciduous Acer griseum Broad crown; reddish peeling bark; good (paperbark maple) fall color. Shallow roots Less than 20’ tall at maturity Medium - Evergreen Acmena smithii Dense, colorful fruits; shiny green foliage. Example on (lilly-pilly tree) JFK Drive in Eastern GGP is doing well; fast-growing. 20-35’ tall at Requires some fertility for best appearance. maturity Auranticarpa Broad crown; orange fruits. Formerly Pittosporum rhombifolia (Queensland pittosporum) Banksia integrifolia Upright habit; creamy flowers; drought tolerant (coast banksia) Brahea edulis Fan palm; drought tolerant. Single specimen established (Guadalupe palm) on north side of JFK just west of intersection with Kezar Drive. Slow growing, sun or shade. Cassia leptophylla Broad crown; bright golden flowers. Good example on (gold medallion tree) Cole at Hayes. Hymenosporum flavum Upright habit; yellow flowers; fast growing (sweetshade) Knightia excelsa Upright habit; curious reddish flowers (rewa-rewa) Metrodiseros umbellata Broad crown; showy flowers. Very slow growing. (southern rata) Magnolia champaca (joy Upright habit; intensely fragrant white flowers perfume tree) or Magnolia x alba (fragrant champaca) Podocarpus totara Brown conical habit; dark green needles. Slow growing; (totara) creates dense shade. Pseudopanax crassifolius Broad crown (lancewood) Pseudopanax ferox Columnar in youth, but rounded with age. Very slow (fierce lancewood) growing Quercus rugosa Broad crown; bold foliage texture (netleaf oak) Medium - Deciduous Acer buergerianum Broad crown; good fall color. Shallow roots (trident maple) 20-35’ tall at maturity Acer campestre Broad crown; yellow fall color. Shallow roots (hedge maple) Acer davidii (David’s Broad crown; striped bark; good fall color. Shallow roots maple) & Acer capillipes (snake-bark maple) Betula utilis var. Upright habit; brilliant white bark. Fast growing; narrow jacquemontii crotches. (Himalayan birch) Parrotia persica Upright habit if grown from seeds; excellent fall color (Persian ironwood) Tall – Evergreen Agathis australis Tall narrow habit; tough leathery leaves. Very slow (New Zealand kauri) growing, but faster than A. robusta More than 35’ tall at Agathis robusta Tall narrow habit; tough leathery leaves. Very slow maturity (Queensland kauri) growing Araucaria h eterophylla Distinct horizontal branching; popular tree in SF (Norfolk Island pine) Casuarina suberosa Irregular upright habit; fine texture. Drought tolerant. (syn. Allocasuarina littoralis) Ceroxylon spp . Elegant feather palm; silvery gray trunk. Slow growing. (wax palm) Good in lawn Chiranthodendron Broad crown; Tall red flowers, bold foliage texture pentadactylon (hand flower tree) Corymbia calophylla Broad crown; showy flowers in summer; Formerly (marri gum; Port Eucalyptus Gregory gum) Corymbia maculata Broad upright habit; attractive bark. Formerly (spotted gum) Eucalyptus; fast-growing Corymbia pauciflora Broad upright habit; attractive silvery white bark. (snow gum) Formerly Eucalyptus; fast seedling growth; plant young. Cryptocarya alba Broad upright habit; aromatic foliage (peumo or Chilean acorn) Cryptomeria japonica Conical habit with pendulous branches; fine needles (Japanese cryptomeria) Cupressus guadalupensis California N ative ; Rounded crown with age; scale -like (Guadalupe cypress) needles Dacrydium cupressinum Upright habit with drooping branches. Very slow growing. Ficus macrophylla Broad crown; deep green leaves; bold foliage texture. (Moreton Bay fig) Shallow roots; creates dense shade. Ficus rubiginosa Deep green leaves, rusty undersides; bold foliage (rustyleaf fig) texture. Good example at Masonic & Fell Hoheria sp. (Hoheria Upright habit; white flowers. Suckers from the roots; populnea, e.g.) very fast-growing (New Zealand lacebark) Jubaea chilensis Feather palm; broad crown of leaves; silvery trunk; (Chilean palm) sun-loving. Magnificent specimen at JFK & Fuchsia Drive; drought-tolerant, prefers sun. Slow-growing until trunking phase, then moderate growth speed. Livistona australis Fan palm. Slow growing when young. (cabbage tree palm) Metrosideros excelsa Moderate growth rate; broad crown, colorful flowers. special color forms ‘Aurea’ variety has yellow flowers; several examples in (New Zealand Christmas San Francisco tree) Metrosideros robusta Broad dense crown; showy red flowers in summer; slow (northern rata) & unusual but very well-adapted Nothofagus dombeyi Upright rounded habit (Dumbeye’s beech or coihue) Parajubaea cocoides Feather palm. Fast growing, sun -loving. (Quito palm) Pinus wallichiana Conical habit; long delicate needles (Himalayan white pine) Quercus chrysolepis San Francisco Native; broad crown. Drought tolerant (canyon live oak) Quercus robur Broad crown (English oak) Quillaja saponaria Broad, oak -like crown; small white flowers. Drought (soapbark) tolerant Quercus tomentella California N ative ; broad upright habit; bold foliage (island oak) texture Syncarpia glomulifera Upright habit; white flowers. Drought tolerant (turpentine tree) Wollemia nobilis Discovered in 1994 in Australia, thought to have been (Wollemi pine) extinct and previously known only through fossil records Tall – Deciduous Pterocarya spp . Broad crown; pendulous catkins and seedheads (wingnut) More than 35’ tall at Quercus garryana California N ative; broad crown. Drought tolerant maturity (Oregon white oak) Quercus kelloggii California N ative ; Upright habit; good fall color (California black oak) Tilia tomentosa Broad upright crown (silver linden) .
Load more

Recommended publications
  • Toward a Resolution of Campanulid Phylogeny, with Special Reference to the Placement of Dipsacales
    TAXON 57 (1) • February 2008: 53–65 Winkworth & al. • Campanulid phylogeny MOLECULAR PHYLOGENETICS Toward a resolution of Campanulid phylogeny, with special reference to the placement of Dipsacales Richard C. Winkworth1,2, Johannes Lundberg3 & Michael J. Donoghue4 1 Departamento de Botânica, Instituto de Biociências, Universidade de São Paulo, Caixa Postal 11461–CEP 05422-970, São Paulo, SP, Brazil. [email protected] (author for correspondence) 2 Current address: School of Biology, Chemistry, and Environmental Sciences, University of the South Pacific, Private Bag, Laucala Campus, Suva, Fiji 3 Department of Phanerogamic Botany, The Swedish Museum of Natural History, Box 50007, 104 05 Stockholm, Sweden 4 Department of Ecology & Evolutionary Biology and Peabody Museum of Natural History, Yale University, P.O. Box 208106, New Haven, Connecticut 06520-8106, U.S.A. Broad-scale phylogenetic analyses of the angiosperms and of the Asteridae have failed to confidently resolve relationships among the major lineages of the campanulid Asteridae (i.e., the euasterid II of APG II, 2003). To address this problem we assembled presently available sequences for a core set of 50 taxa, representing the diver- sity of the four largest lineages (Apiales, Aquifoliales, Asterales, Dipsacales) as well as the smaller “unplaced” groups (e.g., Bruniaceae, Paracryphiaceae, Columelliaceae). We constructed four data matrices for phylogenetic analysis: a chloroplast coding matrix (atpB, matK, ndhF, rbcL), a chloroplast non-coding matrix (rps16 intron, trnT-F region, trnV-atpE IGS), a combined chloroplast dataset (all seven chloroplast regions), and a combined genome matrix (seven chloroplast regions plus 18S and 26S rDNA). Bayesian analyses of these datasets using mixed substitution models produced often well-resolved and supported trees.
    [Show full text]
  • Cryptocarya of Thedirectorategeneral for Cryptocarya Development Cooperation , a Large, Pantropical Genus of Genus Pantropical Large, a , Cryptocarya Species
    Taxonomy of Cryptocarya species of Brazil Taxonomy of Cryptocarya This revision of Brazilian species of Cryptocarya, a large, pantropical genus of species of Brazil Lauraceae, comes highly recommended. Lauraceae is an extensive family of trees that has remained poorly studied because large trees with small fl owers are often ignored by fi eld workers. In a time when so much botanical research is focused on relationships between taxa, it is refreshing to see such a detailed work on species delimitation in a previously inaccessible group. Everything one could want to know about neotropical Cryptocarya species is included: keys, descriptions, illustrations, use, etc. In short, this is a monograph in the classical sense. Pedro L.R. de Moraes The author has studied the species extensively in the fi eld and this fi eld knowledge adds much to the value of this taxonomic review and sets it apart from most revisions that often are largely based on studies of dried specimens. Here, detailed discussions of fi eld characters and photographs of fresh specimens are aptly integrated. In conclusion, this is an excellent contribution to our knowledge of Lauraceae and the author is to be congratulated. One could only wish for more publications on the same high level! December 2007 Dr H. Van der Werff Curator & Assistant Director of Research Missouri Botanical Garden, St. Louis, USA – Volume 3 (2007) – Volume Produced with the fi nancial support of the Directorate General for Development Cooperation Volume 3 (2007) 0885-07_ABC-TAXA3_Cover.indd 1 28-02-2008 14:40:08
    [Show full text]
  • 1151CIRC.Pdf
    CIRCULAR 153 MAY 1967 OBSERVATIONS on SPECIES of CYPRESS INDIGENOUS to the UNITED STATES Agricultural Experiment Station AUBURN UNIVERSIT Y E. V. Smith, Director Auburn, Alabama CONTENTS Page SPECIES AND VARIETIES OF CUPRESSUS STUDIED 4 GEOGRAPHIC DISTRIBUTION-- 4 CONE COLLECTION 5 Cupressus arizonica var. arizonica (Arizona Cypress) 7 Cupressus arizonica var. glabra (Smooth Arizona Cypress) 11 Cupressus guadalupensis (Tecate Cypress) 11 Cupressus arizonicavar. stephensonii (Cuyamaca Cypress) 11 Cupressus sargentii (Sargent Cypress) 12 Cupressus macrocarpa (Monterey Cypress) 12 Cupressus goveniana (Gowen Cypress) 12 Cupressus goveniana (Santa Cruz Cypress) 12 Cupressus goveniana var. pygmaca (Mendocino Cypress) 12 Cupressus bakeri (Siskiyou Cypress) 13 Cupressus bakeri (Modoc Cypress) 13 Cupressus macnabiana (McNab Cypress) 13 Cupressus arizonica var. nevadensis (Piute Cypress) 13 GENERAL COMMENTS ON GEOGRAPHIC VARIATION ---------- 13 COMMENTS ON STUDYING CYPRESSES 19 FIRST PRINTING 3M, MAY 1967 OBSERVATIONS on SPECIES of CYPRESS INDIGENOUS to the UNITED STATES CLAYTON E. POSEY* and JAMES F. GOGGANS Department of Forestry THERE HAS BEEN considerable interest in growing Cupressus (cypress) in the Southeast for several years. The Agricultural Experiment Station, Auburn University, was the first institution in the Southeast to initiate work on the cy- presses in 1937, and since that time many states have introduced Cupressus in hope of finding a species suitable for Christmas tree production. In most cases seed for trial plantings were obtained from commercial dealers without reference to seed source or form of parent tree. Many plantings yielded a high proportion of columnar-shaped trees not suitable for the Christmas tree market. It is probable that seed used in Alabama and other Southeastern States came from only a few trees of a given geo- graphic source.
    [Show full text]
  • Vol 29 #2.Final
    Cypress forest on Guadalupe Island showing signs of goat herbivory. The islets Toro and Zapato are in the far distance. All photographs courtesy of Island Conservation unless otherwise noted. THE RESTORATION OF GUADALUPE ISLAND by Bradford Keitt, Steve Junak, Luciana Luna Mendoza, and Alfonso Aguirre “Guadalupe is remarkable for ende- ing an extensive lichen flora and ing across the island in our own mism in the flora and fauna; but it is a important remnants of unique cloud of dust and exhaust, we’ve naturalist’s paradise despoiled by feral coastal scrub and island chaparral also wondered what lures us back goats, housecats, and mice. [The island] communities. year after year. Yet, just as the bar- is a Mexican national treasure in dire Guadalupe stirs a love-hate re- ren beauty of Guadalupe and the need of protection” (Moran 1996). lationship in those that have come excitement of finding rare and ex- to know its sere, rugged landscape. otic plants seduced Dr. Moran, we uadalupe Island rises like a Botanist Reid Moran, whose 40 too are captivated by the island’s Grampart from the wind- years of work on Guadalupe brought ecosystem. For that reason, we have whipped sea off the Pacific attention to its unique flora, called committed ourselves to protecting coast of the Baja California Penin- it his “very favorite island,” but he and restoring the remaining pock- sula. As the westernmost territory mused that “at too close a range it ets of its unique flora and fauna in Mexico, the 26,000 hectare is- has sometimes seemed a hot, ugly, with the hope that the island can land is a lonely outpost for a small weedy, insuperable rock pile that I eventually recover some of its origi- military garrison and a community have almost wondered, at least fleet- nal biodiversity.
    [Show full text]
  • Pollen-Based Temperature and Precipitation Records of the Past
    University of Wollongong Research Online Faculty of Science, Medicine and Health - Papers Faculty of Science, Medicine and Health 2017 Pollen-based temperature and precipitation records of the past 14,600 years in northern New Zealand (37°S) and their linkages with the Southern Hemisphere atmospheric circulation Ignacio Jara Victoria University of Wellington Rewi Newnham Victoria University of Wellington Brent V. Alloway University of Wollongong Janet M. Wilmshurst Landcare Research NZ Andrew Rees Victoria University of Wellington Publication Details Jara, I. A., Newnham, R. M., Alloway, B. V., Wilmshurst, J. M. & Rees, A. B.H. (2017). Pollen-based temperature and precipitation records of the past 14,600 years in northern New Zealand (37°S) and their linkages with the Southern Hemisphere atmospheric circulation. The oH locene: a major interdisciplinary journal focusing on recent environmental change, 27 (11), 1756-1768. Research Online is the open access institutional repository for the University of Wollongong. For further information contact the UOW Library: [email protected] Pollen-based temperature and precipitation records of the past 14,600 years in northern New Zealand (37°S) and their linkages with the Southern Hemisphere atmospheric circulation Abstract Regional vegetation, climate history, and local water table fluctuations for the past 14,600 years are reconstructed from pollen and charcoal records of an ombrogenous peatbog in northern New Zealand (38°S). A long-term warming trend between 14,600 and 10,000 cal. yr BP is punctuated by two brief plateaux between 14,200-13,800 and 13,500-12,000 cal. yr BP. Periods of relatively drier conditions are inferred between 14,000-13,400 and 12,000-10,000 cal.
    [Show full text]
  • Phytophthora Ramorum Sudden Oak Death Pathogen
    NAME OF SPECIES: Phytophthora ramorum Sudden Oak Death pathogen Synonyms: Common Name: Sudden Oak Death pathogen A. CURRENT STATUS AND DISTRIBUTION I. In Wisconsin? 1. YES NO X 2. Abundance: 3. Geographic Range: 4. Habitat Invaded: 5. Historical Status and Rate of Spread in Wisconsin: 6. Proportion of potential range occupied: II. Invasive in Similar Climate YES NO X Zones United States: In 14 coastal California Counties and in Curry County, Oregon. In nursery in Washington. Canada: Nursery in British Columbia. Europe: Germany, the Netherlands, the United Kingdom, Poland, Spain, France, Belgium, and Sweden. III. Invasive in Similar Habitat YES X NO Types IV. Habitat Affected 1. Habitat affected: this disease thrives in cool, wet climates including areas in coastal California within the fog belt or in low- lying forested areas along stream beds and other bodies of water. Oaks associated with understory species that are susceptible to foliar infections are at higher risk of becoming infected. 2. Host plants: Forty-five hosts are regulated for this disease. These hosts have been found naturally infected by P. ramorum and have had Koch’s postulates completed, reviewed and accepted. Approximately fifty-nine species are associated with Phytophthora ramorum. These species are found naturally infected; P. ramorum has been cultured or detected with PCR but Koch’s postulates have not been completed or documented and reviewed. Northern red oak (Quercus rubra) is considered an associated host. See end of document for complete list of plant hosts. National Risk Model and Map shows susceptible forest types in the mid-Atlantic region of the United States.
    [Show full text]
  • Junker's Nursery
    1 JUNKER’S NURSERY LTD 2011-2012 Higher Cobhay (01823) 400075 Milverton Somerset E-mail: [email protected] TA4 1NJ Website: www.junker.co.uk See website for more detail: www.junker.co.uk elcome to a new look catalogue. Mind you, the catalogue is season, but if that means planting at a time of year when the plants have2 the least of the changes this year! We have finally completed best chance of success, then that can only be a good thing. I would en- W our relocation to our new site. Although we have owned it courage you therefore to make your plans and reserve your plants for for nearly 4 years now, personal circumstances intervened and it has when we can lift them. Typically we start this in mid-October. The taken longer to complete the move than we anticipated. It was definitely plants don’t need to have completely lost their leaves, but they do need worth the wait though (even if the rain is streaming down the windows to have finished active growth for the season. We will then continue lift- yet again, even as I write this in late July!) So much is different that it’s ing right through until March or so, but late planting can be risky in the difficult to know where to start...what remains unchanged however is our event of a dry spring such as we’ve had the last couple of years. Lifting commitment to growing the most exciting plants to the best of our abil- is weather dependant though, as we can’t continue if everything is water- ity, and to giving you, the customer, the kind of personal service that logged or frozen solid.
    [Show full text]
  • Species-Specific Basic Stem-Wood Densities for Twelve Indigenous Forest and Shrubland Species of Known Age, New Zealand
    Marden et al. New Zealand Journal of Forestry Science (2021) 51:1 https://doi.org/10.33494/nzjfs512021x121x E-ISSN: 1179-5395 published on-line: 15/02/2021 Research Article Open Access New Zealand Journal of Forestry Science Species-specific basic stem-wood densities for twelve indigenous forest and shrubland species of known age, New Zealand Michael Marden1,*, Suzanne Lambie2 and Larry Burrows3 1 31 Haronga Road, Gisborne 4010, New Zealand 2 Manaaki Whenua – Landcare Research, Private Bag 3127, Hamilton 3240, New Zealand 3 Manaaki Whenua – Landcare Research, PO Box 69041, Lincoln 7640, New Zealand *Corresponding author: [email protected] (Received for publication 19 July 2019; accepted in revised form 26 January 2021) Abstract Background: Tree carbon estimates for New Zealand indigenous tree and shrub species are largely based on mean of sites throughout New Zealand. Yet stem-wood density values feed directly into New Zealand’s international and nationalbasic stem-wood greenhouse densities gas accounting. derived from We a limitedaugment number existing of publishedtrees, often basic of unspecified stem-wood age density and from data a limited with new number age- old, across 21 widely-distributed sites between latitudes 35° tospecific estimate values carbon for 12stocks. indigenous forest and shrubland species, including rarely obtained values for trees <6-years and 46° S, and explore relationships commonly used Methods: The volume of 478 whole stem-wood discs collected at breast height (BH) was determined by water displacement, oven dried, and weighed. Regression analyses were used to determine possible relationships between basic stem-wood density, and tree height, root collar diameter (RCD), and diameter at breast height (DBH).
    [Show full text]
  • Status of Red Panda in Sikkim: a Case Study in East Sikkim
    STATUS OF RED PANDA IN SIKKIM: A CASE STUDY IN EAST SIKKIM Partha S. Ghose, Basant K. Sharma, Rajarshi Chakraborty and Karma Legshey D. ABSTRACT ed panda is the state animal of Sikkim and its population in the wild is highly vulnerable globally. Very little is known about red panda from Sikkim. With this background in mind the present collaborative survey by WWF- RIndia and Forest Environment and Wildlife Management Department, Government of Sikkim was initiated since 2005 to understand red panda's status in the wild and threats they are exposed to. The present work was conducted at three protected areas of East District and the results were subsequently used to assess the extent of red panda habitat in East District. Our results show that bamboo presence and cover emerged as the essential habitat feature to support red panda population. Among forest types mixed conifer was best suited for red pandas, followed by oak forests. However, conifer forest unlike the most beliefs did not emerge as the best possible habitat feature. The threat issues observed during the survey were discussed. KEYWORDS: Red panda, Sikkim, mixed conifer, oak forest, feral dogs, threats Red Panda photographed at Chowkidara Phedi-Pangolakha Wild Life Sanctuary 363 Red panda sighted at Pangolakha Ridge Top INTRODUCTION ed panda is a unique carnivore that has adapted to the herbivore mode of life and is a resident of Himalayan and Hengduan mountain ranges (Roberts and Gittleman, 1984; Glatston, 1994; Wei et al., 1999; Chowdhury, 2001). RLike its phylogenetic position, status of the red panda in wild has also been a matter of great discussion and speculation for over a long period (Glatston, 1994).
    [Show full text]
  • Trees for the Land
    Trees for the Land GROWING TREES IN NORTHLAND FOR PROTECTION, PRODUCTION AND PLEASURE FOREWORD Trees are an integral, highly visible and valuable part of the Northland landscape. While many of us may not give much thought to the many and varied roles of trees in our lives, our reliance on them can not be overstated. Both native and exotic tree species make important contributions to our region – environmentally, socially, culturally and economically. Pohutukawa – a coastal icon – line our coasts and are much loved and appreciated by locals and tourists alike. Similarly, many of the visitors who come here do not consider their trip complete without a journey to view the giant and majestic kauri of Waipoua, which are of huge importance to Mäori. Many Northlanders make their livings working in the forest industry or other industries closely aligned to it and trees also play a crucial role environmentally. When all these factors are considered, it makes sense that wise land management should include the planting of a variety of tree species, particularly since Northland is an erosion- prone area. Trees help stabilise Northland’s hillsides and stream banks. They help control winter flood flows and provide shelter and shade for the land, rivers and stock. They also provide valuable shelter, protection and food for Northland’s flora and fauna. This publication draws together tree planting information and advice from a wide range of sources into one handy guide. It has been written specifically for Northlanders and recommends trees that will survive well in our sometimes demanding climate. The Northland Regional Council is committed to the sustainable management and development of natural resources like our trees.
    [Show full text]
  • 2. ACER Linnaeus, Sp. Pl. 2: 1054. 1753. 枫属 Feng Shu Trees Or Shrubs
    Fl. China 11: 516–553. 2008. 2. ACER Linnaeus, Sp. Pl. 2: 1054. 1753. 枫属 feng shu Trees or shrubs. Leaves mostly simple and palmately lobed or at least palmately veined, in a few species pinnately veined and entire or toothed, or pinnately or palmately 3–5-foliolate. Inflorescence corymbiform or umbelliform, sometimes racemose or large paniculate. Sepals (4 or)5, rarely 6. Petals (4 or)5, rarely 6, seldom absent. Stamens (4 or 5 or)8(or 10 or 12); filaments distinct. Carpels 2; ovules (1 or)2 per locule. Fruit a winged schizocarp, commonly a double samara, usually 1-seeded; embryo oily or starchy, radicle elongate, cotyledons 2, green, flat or plicate; endosperm absent. 2n = 26. About 129 species: widespread in both temperate and tropical regions of N Africa, Asia, Europe, and Central and North America; 99 species (61 endemic, three introduced) in China. Acer lanceolatum Molliard (Bull. Soc. Bot. France 50: 134. 1903), described from Guangxi, is an uncertain species and is therefore not accepted here. The type specimen, in Berlin (B), has been destroyed. Up to now, no additional specimens have been found that could help clarify the application of this name. Worldwide, Japanese maples are famous for their autumn color, and there are over 400 cultivars. Also, many Chinese maple trees have beautiful autumn colors and have been cultivated widely in Chinese gardens, such as Acer buergerianum, A. davidii, A. duplicatoserratum, A. griseum, A. pictum, A. tataricum subsp. ginnala, A. triflorum, A. truncatum, and A. wilsonii. In winter, the snake-bark maples (A. davidii and its relatives) and paper-bark maple (A.
    [Show full text]
  • Acer Buergerianum Plants, Adequately Moist in Summer but Well Drained in Winter Is "Trident Maple" a Pretty Small Tree Whose Grace Is Enhanced by the Key to Success
    Acer buergerianum plants, adequately moist in summer but well drained in winter is "Trident Maple" A pretty small tree whose grace is enhanced by the key to success. 3m. the small three-lobed leaves. Particularly good autumn colour begins scarlet turning orange-yellow. A good hardy Maple Acer x conspicuum 'Silver Cardinal' tolerant of many less favoured sites. 4m. This Snakebark has the most incredible pink and cream variegated foliage, highlighted by the red petioles and young stems. It Acer circinatum 'Monroe' occurred as a chance seedling of A. pensylvanicum and received A plant I've lusted after for years! Shrubby habit, with deeply an Award of Merit in 1985. Our stock is directly derived from incised light green leaves (even more so than A. japonicum the original seedling in the Windsor Great Park. Unless your soil 'Aconitifolium'). Predominantly yellow autumn colours may is very good, it is safest in dappled shade. 3m. develop some orange. Worthy of a special site. 3m. Acer x conspicuum 'Silver Vein' Acer circinatum 'Pacific Fire' A hybrid between A. davidii George Forrest and A. Imagine the coral bark colour of Acer palmatum 'Sangokaku' pensylvanicum Erythrocladum found at Hilliers about 1960. It is combined with the larger leaves and more tolerant growth arguably the best of the basic snakebarks for garden suitability requirements of this species, and the result is a plant with and good colour with its rich purple and white striped winter awesome potential. Fantastic autumn colour too. bark, becoming green with maturity. 5m. Acer circinatum 'Sunglow' Acer davidii This has been on my "wanted" list ever since I first saw it Delightful small tree noted for dazzling autumn colour and photographed! Apricot coloured young growth matures to attractive white striped purple bark in winter.
    [Show full text]