Alnus nepalensis D.Don

Nepal black cedar (en)

Species

Angiosperms > Fagales > Betulaceae > Alnus

Characteristics

Trees to 15 m tall; bark gray or dark gray, smooth. Branchlets dark brown, sparsely yellow pubescent when young, glabrescent. Buds stipitate, with 2 glabrous, ribbed scales. Petiole robust, 1-2.5 cm, subglabrous; leaf blade obovate-lanceolate, obovate-oblong, ovate, or elliptic, 4-16 × 2.5-10 cm, abaxially with dense, resinous glands, yellow pubescent along veins, bearded in axils of lateral veins, adaxially glabrous, base cuneate or broadly cuneate, rarely subrounded, margin entire or remotely minutely serrate, apex abrupt or acute, rarely acuminate; lateral veins 8-16 on each side of midvein. Female inflorescences numerous, in a panicle, ellipsoid, 2-2.2 cm × 7-8 mm; peduncle robust, 2-8 mm, glabrous; bracts ca. 4 mm, woody, persistent, base cuneate, apex rounded, 5-lobed. Nutlet oblong, ca. 2 mm, with membranous wings ca. 1/2 as wide as nutlet. Fl. May-Jun, fr. Jul-Sep. 2n = 28, 56.
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Tree, 8-15 m; timber white; twigs glabrescent, ribbed, hardly triangular. Leaves spiral, ovate to oblong, acute or short-acuminate, rounded or cuneate at the base, 7-21 by 4-10 cm; nerves 12-16 pairs, beneath as the prominent crossbar-veins laxly puberulous (glabrescent) and vein-axils bearded; midrib and nerves sulcate and glabrous above; petiole strong, c. 5-10 times as short as the blade, 1½-2 cm. Male catkins up to 10 cm by 3-5 mm, in a terminal panicle up to 16 cm. Female inflorescences short, axillary, bearing 3-8 oblong, 3-6 mm peduncled catkins 10-17 by 6-7 mm. Nuts obtrapezoid, emarginate, incl. the wing 2 mm through, crowned by the style base.
A tree.
Life form perennial
Growth form tree
Growth support free-standing
Foliage retention deciduous
Sexuality monoecy
Pollination anemogamy
Spread -
Mature width (meter) -
Mature height (meter) 22.0
Root system -
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 c3

Environment

Forests in ravines, on stream banks and occasionally in drier localities, 900-2,700 metres in the Himalayas. Riverbanks or village margins, often forming pure stands, at elevations of 200-2,800 metres in China.
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Forests in ravines, on stream banks and occasionally in drier localities, 900-2,700 metres in the Himalayas. Riverbanks or village margins, often forming pure stands, at elevations of 200-2,800 metres in China.
It is a temperate plant. Arboretum Tasmania.
Light 5-9
Soil humidity 5-8
Soil texture 2-4
Soil acidity 3-8
Soil nutriment -
Hardiness (USDA) 8-10

Usage

Uses. Imported for experiments of reafforestation on eroded slopes under everwet climatic conditions, growing well into thick trees between 700 and 1800 m.
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The tender leaves are fermented and used for a tea drink.
Uses afforestation charcoal dye environmental use fodder food fuel fuelwood material medicinal shade tea timber wood
Edible leaves
Therapeutic use Hypoglycemic agents (bark), Parasympatholytics (bark), Spasm (bark), Wounds and injuries (leaf), Diarrhea (root), Antiviral agents (unspecified)
Human toxicity -
Animal toxicity -

Cultivation

Can be grown by cuttings or seedlings. Seeds needs soaking.
Mode cuttings seedlings
Germination duration (days) -
Germination temperacture (C°) -
Germination luminosity -
Germination treatment soaking
Minimum temperature (C°) -
Optimum temperature (C°) 15 - 28
Size -
Vigor -
Productivity -

Images

Alnus nepalensis unspecified picture

Distribution

Alnus nepalensis world distribution map, present in Bangladesh, China, India, Myanmar, Malaysia, Nepal, Thailand, United States of America, and Viet Nam

Conservation status

Alnus nepalensis threat status: Least Concern

Identifiers

LSID urn:lsid:ipni.org:names:294958-1
WFO ID wfo-0000946943
COL ID C2RN
BDTFX ID -
INPN ID -
Wikipedia (EN) Link
Wikipedia (FR) Link

Synonyms

Clethropsis nepalensis Betula leptophylla Betula leptostachya Alnus nepalensis Alnus boshia