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Populus simoni

Description

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Family Salicaceae

Trees or shrubs , deciduous or rarely evergreen , dioecious, rarely polygamous. Leaves alternate, rarely subopposite, usually petiolate , simple ; stipules persistent or caducous . Catkins erect or pendulous; each flower usually with a cupular disc or 1 or 2(or 3) nectariferous glands . Male flowers with 2-many stamens; filaments filiform , free or united ; to connate ; anthers 2(or 4) -loculed, dehiscing longitudinally. Female flowers with 1 pistil, sessile or stipitate ; ovary superior, 1- or 2-loculed; ovules several to many, anatropous , with a 1 integument; style 1, 2 in Chosenia; stigmas 2-4. Capsule dehiscing by 2-4(or 5) valves ; placenta and inside wall of ovary with long hairs . Seeds 4-numerous, glabrous ; hairs and seeds simultaneously deciduous when capsule matures.

Three genera and about 620 species: mainly N hemisphere, a few in S hemisphere; three genera and 347 species (236 endemic) in China, including at least nine hybrids and at least one introduced species .[1]

Genus Populus

Trees ; trunk usually straight; bark furrowed or smooth , often gray or tan; pith mostly 5-angled in cross section . Terminal bud terete or angled ; bud scales several, unequal. Stipules small, deciduous; petiole terete or laterally compressed ; leaf blade usually ovate to deltoid-ovate. Flowering precocious ; catkins pendulous. Flowers anemophilous ; bracts apically lobed or laciniate , membranous, caducous ; flowers with disc obliquely cupular. Male flower: stamens 4-many; filaments short, free ; anthers dull red. Female flower: ovary 1-loculed; style 1, short or not; stigmas 2-4. Capsule 2-4(or 5) -valved. Seeds few to numerous , small. Cotyledons elliptic .

About 100 species: N Africa, Asia, Europe, North America; 71 species (47 endemic) in China, including at least nine hybrids.

The taxonomy of Populus in China, at species level, is at a preliminary stage. To reach an adequate understanding, it is necessary to make direct observations in natural populations of all morphological variations between individuals, for all species and at all seasonal developmental stages. Moreover, other methods beyond morphological studies need to be applied, especially anatomic and chemotaxonomic analyses.[2]

Taxonomy

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Similar Species

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Members of the genus Populus

ZipcodeZoo has pages for 82 species, subspecies, varieties, forms, and cultivars in this genus:

P. acuminata (Lanceleaf Cottonwood) · P. alba (Silver Poplar) · P. alba 'Pyramidalis' (Bolleana Poplar) · P. alba 'Richardii' (Silver Poplar) · P. angustifolia (Narrow-Leaf Cottonwood) · P. balsamifera (Balsam Poplar) · P. balsamifera balsamifera (Hackmatack) · P. balsamifera trichocarpa (Black Cottonwood) · P. balsamifera subsp. trichocarpa (Black Cottonwood) · P. berolinensis (Berlin Laurel Poplar) · P. brayshawii (Hybrid Balsam Poplar) · P. canadensis (Carolina Poplar) · P. canescens (Gray Poplar) · P. canescens 'Tower' (Gray Poplar) · P. cathayana (Poplar) · P. deltoides (Common Cottonwood) · P. deltoides deltoides (Eastern Cottonwood) · P. deltoides occidentalis (Plains Cottonwood) · P. deltoides var. monilifera (Match Poplar) · P. deltoides wislizeni (Rio Grande Cottonwood) · P. deltoides wislizenii (Rio Grande Cottonwood) · P. deltoides subsp. monilifera (Eastern Cottonwood) · P. deltoides 'Siouxland' (Eastern Cottonwood) · P. deltoides subsp. wislizeni (Rio Grande Cottonwood) · P. euphratica (Euphrates Poplar) · P. fremontii (Cottonwood) · P. fremontii mesetae (Arizona Cottonwood) · P. fremontii subsp. mesetae (Fremont Cottonwood) · P. gileadensis (Poplars) · P. grandidentata (Big-Tooth Aspen) · P. heimburgeri (Heimburger's Poplar) · P. heterophylla (Black Cottonwood) · P. hinckleyana (Cottonwood) · P. ilicifolia (Tana River Poplar) · P. inopina (Populus) · P. jackii (Balm-Of-Gilead) · P. maximowiczii (Doronoki) · P. maximowiczii x nigra 'Nm6' (Hybrid Poplar) · P. maximowiczii x trichocarpa 'Androscoggin' (Hybrid Poplar) · P. nigra (Black Cottonwood) · P. nigra betulifolia (Wild Black Poplar) · P. nigra var. betulifolia (Ench) · P. nigra 'Italica' (Italian Poplar) · P. nigra 'Thevestina' (Lombardy Poplar) · P. parryi (Parry's Cottonwood) · P. rouleauiana (Populus) · P. simonii (Chinese Poplar) · P. simonii 'Fastigiata' (Chinese Poplar) · P. smithii (Smith's Poplar) · P. tomentosa (Chinese White Poplar) · P. tremula (Aspen) · P. tremula tremula (European Aspen) · P. tremula var. sieboldii (Aspen) · P. tremula 'Erecta' (Aspen) · P. tremula 'Tahoe' (Aspen) · P. tremuloides (Quaking Aspen) · P. tremuloides var. sieboldi (Trembling Aspen) · P. tremuloides 'Prairie Gold' (Quaking Aspen) · P. trichocarpa x nigra '311-93' (Hybrid Poplar) · P. wilsonii (Populus) · P. × acuminata (Lanceleaf Cottonwood) · P. × berolinensis (Poplar) · P. × brayshawii (Hybrid Balsam Poplar) · P. × canadensis (Carolina Poplar) · P. x canadensis 'Imperial' (Carolina Poplar) · P. x canadensis 'Nor'easter' (Carolina Poplar) · P. x canadensis 'Op-367' (Carolina Poplar) · P. x canadensis 'Prairie Sky' (Carolina Poplar) · P. x canadensis 'Robusta' (Carolina Poplar) · P. × canescens (Gray Poplar) · P. x generosa '15-29' (Interamerican Hybrid Poplar) · P. x generosa '49-177' (Interamerican Hybrid Poplar) · P. × heimburgeri (Heimburger's Poplar) · P. × hinckleyana (Hinckley's Poplar) · P. × inopina (Populus) · P. x jackii (Balm-Of-Gilead) · P. × parryi (Parry's Cottonwood) · P. × rouleauiana (Populus) · P. × smithii (Smith's Poplar) · P. x x (Lanceleaf Cottonwood) · P. x 'Red Caudina' (Cottonless Cottonwood) · P. '#6' (Brooks Poplar)

More Info

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Further Reading

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Notes

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Contributors

Data Sources

Accessed through GBIF Data Portal December 12, 2007:

Identifiers

Footnotes

  1. Cheng-fu Fang, Shi-dong Zhao & Alexei K. Skvortsov "Salicaceae". in Flora of China Vol. 4 Page 139. Published by Science Press (Beijing) and Missouri Botanical Garden Press. Online at EFloras.org. [back]
  2. "Populus". in Flora of China Vol. 4 Page 139. Published by Science Press (Beijing) and Missouri Botanical Garden Press. Online at EFloras.org. [back]
Last Revised: 2014-05-11