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Salix humilis

(Prairie Willow)

Common Names

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Common Names in English:

Prairie Willow, Upland Willow

Common Names in German:

Prärieweide

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]

Subfamily Coliadinae

Sulphurs are members of the Family Pieridae. In North America, sulphurs range from Mexico to northern Canada. Females of most species are distinctly different from males. Some species are mud-puddlers and will collect around muddy pools on dirt roads. Sulphurs overwinter as larvae.

Genus Salix

Trees or shrubs deciduous, rarely evergreen (if shrubs, then erect , ascending procumbent , creeping , or cushion-shaped) ; pith terete . Branches terete. Terminal bud usually absent; buds with single scale. Leaves alternate, rarely subopposite or opposite; stipules small, free , deciduous or persistent , developed mainly on vigorous branchlets ; petiole short; leaf blade variously shaped, often long and narrow. Flowering precocious , coetaneous , or serotinous; catkins upright or spreading , rarely pendulous; bracts entire, persistent or caducous . Flowers entomophilous or anemophilous , each with 1 or 2 glands : 1 abaxial (dorsal) or absent and 1 adaxial (ventral), i.e. , abaxial gland between bract and stipe, adaxial gland between stipe and rachis. Male flower: stamens 2-many; filaments free or partly to completely connate , usually exceeding bracts; anthers 2-loculed (rarely 4-loculed if filaments connate), opening lengthwise. Female flower: ovary 2-loculed, sessile or stipitate ; style 1, short, slender, or absent, entire or 2-cleft; stigmas 1 or 2, lobed or entire. Capsule 2-valved. Seeds mostly green or gray-green, small, surrounded by fine hairs .

About 520 species: cold and temperate regions of N hemisphere, a few in S hemisphere; 275 species (189 endemic, at least one introduced ) in China.[2]

Physical Description

Habit: Shrub

Flowers: Bloom Period: January, February.

Size/Age/Growth

Size: 36-48" tall.

Habitat

Typically found at an altitude of 0 to 4,091 meters (0 to 13,422 feet).[3]

Biology

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Reproduction

Duration: Perennial

Growth

Culture: Space 36-48" apart.

Sunlight: Sun Exposure: Full Sun .

Temperature: Cold Hardiness: 4a, 4b, 5a, 5b, 6a, 6b. (map)

Taxonomy

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Notes

Publishing author : Pursh Publication : Fl. Am. Sept. ii. 609 Publishing author: Bosc ex Koch Publication: Comment. 16. Publishing author: Willd. Publication: Sp. Pl. iv . 692 Publishing author: Michx. Publication: Fl. Bor.-Amer. (Michaux) ii. 226 Publishing author: Scop. Publication: Fl. Carniol., ed. 2. 2: 255 1772A tentatively accepted name in the RHS Horticultural Database.

Publishing author: Fernald Publication: Rhodora 48: 46 1946 Basionym author: (Andersson)An accepted name in the RHS Horticultural Database.

Publishing author: Farw. Publication: Ann. Rep. Mich. Acad. Sci 6: 206 1904 Publishing author: Fernald Publication: Rhodora 48: 45 1946 Publishing author: Zabel in Beissn., Schelle & Zabel Publication: Handb. Laubholzben. 32 1903 Name Status: Accepted Name. Latest taxonomic scrutiny: 15-Mar-2000

Place of publication: Arbust. amer. 140. 1785

Name verified on 07-Nov-1985 by ARS Systematic Botanists. Last updated: 23-Aug-1994

Similar Species

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Members of the genus Salix

ZipcodeZoo has pages for 2764 species, subspecies, varieties, forms, and cultivars in this genus. Here are just 100 of them:

S. abnormis · S. abromeitiana · S. abscondita · S. accedens · S. acmophylla · S. acmophylla var. russanovii · S. acridentata · S. acuminata · S. acuminatomicrophylla · S. acuta · S. acutata · S. acutidens · S. acutifolia · S. acutifolia 'Blue Streak' · S. acutifolia 'Lady Aldenham No 2' · S. acutifolia 'Pendulifolia' (Willow) · S. adamauensis · S. adenodontos · S. adenophylla · S. adenophylloides · S. adscendens · S. 'Aegma Brno' · S. aegyptiaca · S. aemulans · S. aequitriens · S. aequivoca · S. aeruginosa · S. affinis · S. aglaja · S. ahlbergi · S. ajanensis · S. alatavica · S. alaternoides · S. alaxensis (Felt-Leaf Willow) · S. alaxensis (Anderss.) Coville var. alaxensis (Anderss.) Coville · S. alaxensis f. obovalifolia · S. alaxensis var. alaxensis (Feltleaf Willow) · S. alaxensis var. longistylis (Felt-Leaf Willow) · S. alaxensis var. silicicola · S. alba (Golden Willow) · S. alba argentea · S. alba 'Aurea' · S. alba 'Belders' · S. alba 'Britzensis' · S. alba caerulea · S. alba 'Calva' · S. alba 'Cardinalis' · S. alba 'Chermesina' (White Willow) · S. alba coerulea · S. alba 'Dart's Snake' · S. alba f. argentea · S. alba f.regalis · S. alba 'Flame' (Flame White Willow) · S. alba 'Golden Ness' · S. alba 'Hutchinson's Yellow' · S. alba L. 'Barlo' · S. alba L. 'Bredevoort' · S. alba L. 'Drakenburg' · S. alba L. forma splendes J.Anderson · S. albaforma tristis (Wisconsin Weeping Willow) · S. alba L. 'Het Goor' · S. alba L. 'Lichtenvoorde' · S. alba L. 'Lievelde' · S. alba L. 'Sericea' · S. alba 'Liempde' · S. alba micans · S. alba 'Orange Spire' · S. alba 'Raesfeld' · S. alba 'Richmond' · S. alba 'Rockanje' · S. alba 'Saint Oedendrode' · S. alba 'Splendens' · S. alba subsp. coerulea · S. alba 'Tristis' · S. alba var. caerulea 'Wantage Hall' · S. alba var. sericea · S. alba var. splendens · S. alba var. subintegra · S. alba var. vitellina 'Britzensis' · S. alba var. vitellina 'Concolor' · S. alba var. vitellina 'Yelverton' · S. alba 'Vitellina' (Golden Weeping Willow) · S. alba 'Vitellina Pendula' · S. alba 'Vitellina Tristis' · S. alba vittelina · S. alberti · S. albescens · S. albicans · S. albida · S. albiphila · S. albo · S. albovirens · S. alexensis · S. alexii-skvortzovii · S. alfredi · S. alfredii · S. alfredii var. fengxianica · S. algista · S. alifera · S. allochroa

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 November 22, 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. "Salix". in Flora of China Vol. 4 Page 162. Published by Science Press (Beijing) and Missouri Botanical Garden Press. Online at EFloras.org. [back]
  3. Mean = 428.050 meters (1,404.364 feet), Standard Deviation = 405.330 based on 2,009 observations. Altitude information for each observation from British Oceanographic Data Centre. [back]
Last Revised: 7/1/2009