Salix nummularia Andersson

Barren ground willow (en)

Species

Angiosperms > Malpighiales > Salicaceae > Salix

Characteristics

Plants 0.01-0.03 m, (dwarf), forming clones by layering. Stems trailing; branches yellow-brown or red-brown, glabrous; branchlets yellow-brown or red-brown, pubescent, pilose, or glabrescent. Leaves: stipules absent or rudimentary; petiole 1.5-2 mm (glabrous or pubescent adaxially); largest medial blade (2 pairs of secondary veins arising at or close to base, arcing toward apex) broadly elliptic, subcircular, broadly ovate, or elliptic, 9-22(-30) × 7.5-14(-19) mm, 1.2-2 times as long as wide, base rounded, subcordate, cordate, or convex, margins flat or slightly revolute, entire or serrulate, apex convex, rounded, or retuse, abaxial surface glabrous, adaxial highly glossy, glabrous; proximal blade margins entire or serrulate; juvenile blade pilose or puberulent abaxially. Catkins: from lateral buds; staminate (3-8 flowers), 3.2-6.6 × 2-5.2 mm, flowering branchlet 0.8-4.6 mm; pistillate loosely flowered (3-5 flowers), shape indeterminate, 7.5-13 × 3-10 mm, flowering branchlet 0.5-10 mm; floral bract tawny, 0.6-1.4 mm, apex rounded or truncate, entire, abaxially glabrous or sparsely hairy. Staminate flowers: abaxial nectary (0.3-)0.5-0.7 mm, adaxial nectary narrowly oblong or oblong, 0.7-1.1 mm, nectaries distinct, or connate and cup-shaped; filaments distinct or connate less than 1/2 their lengths, glabrous; anthers ellipsoid, 0.4-0.5 mm. Pistillate flowers: abaxial nectary (0-)0.6-0.9 mm, adaxial nectary narrowly oblong or oblong, 0.6-1.4 mm, longer than stipe, nectaries connate and shallowly cup-shaped; stipe 0-0.7 mm; ovary pyriform, glabrous, beak slightly bulged below styles; ovules 8-10 per ovary; styles 0.2-1 mm; stigmas flat, abaxially non-papillate with rounded tip, or broadly cylindrical, 0.2-0.27-0.32 mm. Capsules 3.5-7.5 mm. 2n = 38.
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Shrubs procumbent, dwarf; bark russet. Branches to 80 cm, (2-)10 mm thick; branchlets yellowish brown, pilose when young, glabrescent. Buds oblong-ovoid, 2-3 mm, glabrous.Stipules present; petiole ca. 3 mm, pilose when young, glabrescent; leaf blade obovate-elliptic, suborbicular, or elliptic, 0.5-1.7 × 0.5-1.5 cm, leathery, abaxially green, villous when young,glabrescent, adaxially dull green, base rounded or rounded-cuneate, margin entire, apex rounded, obtuse, or retuse. Flowering coetaneous. Catkins terminal. Male catkin ovoid, ca. 8 mm,10-20-flowered; bracts yellowish brown, orbicular, ca. 1 mm, long pubescent. Male flower: glands 2, 0.3-0.4 mm, adaxial gland ovate or orbicular, sometimes 2-cleft, abaxial gland 2-or3-parted or entire; stamens 2, distinct, glabrous. Female catkin 5-8 mm, 10-20-flowered; bracts as in male catkin. Female flower: adaxial gland usually 2-or 3(or 4)-lobed, ca. 2 × as long asstipe, abaxial gland shorter than adaxial gland; ovary sublanceolate, apex acuminate, 3-4 mm, glabrous; stipe ca. 1 mm, elongated in fruit; style ca. 0.5 mm; stigma 4-lobed. Fl. Jul, fr. Jul.
Life form perennial
Growth form shrub
Growth support -
Foliage retention deciduous
Sexuality dioecy
Pollination -
Spread -
Mature width (meter) -
Mature height (meter) 0.01 - 0.03
Root system creeping-root
Rooting depth (meter) -
Root diameter (meter) -
Flower color
Blooming months
JanFebMar
AprMayJun
JulAugSep
OctNovDec
Fruit color -
Fruiting months
JanFebMar
AprMayJun
JulAugSep
OctNovDec
Nitrogen fixer -
Photosynthetic pathway -

Environment

Light 7-9
Soil humidity 3-7
Soil texture 3-4
Soil acidity -
Soil nutriment -
Hardiness (USDA) 5-10

Usage

Uses -
Edible -
Therapeutic use -
Human toxicity -
Animal toxicity -

Cultivation

Mode -
Germination duration (days) -
Germination temperacture (C°) -
Germination luminosity -
Germination treatment -
Minimum temperature (C°) -
Optimum temperature (C°) -
Size -
Vigor -
Productivity -

Distribution

Salix nummularia world distribution map, present in China, Japan, Liberia, Mongolia, Korea (Democratic People's Republic of), and United States of America

Identifiers

LSID urn:lsid:ipni.org:names:778316-1
WFO ID wfo-0000929963
COL ID 6XDPQ
BDTFX ID -
INPN ID -
Wikipedia (EN)
Wikipedia (FR) Link

Synonyms

Salix tundricola Salix tschanbaischanica Salix nummularia Salix polyadenia Salix pauciflora Salix vulcani Salix nummularia f. hebecarpa Salix pauciflora var. cyclophylla Salix pauciflora var. stenophylla Salix pauciflora var. hebecarpa Salix nummularia subsp. pauciflora Salix nummularia var. cyclophylla Salix nummularia var. stenophylla Salix nummularia subsp. tundricola Salix pauciflora f. hebecarpa Salix polyadenia var. tschanbaischanica