Alnus formosana Makino

Formosan alder (en)

Species

Angiosperms > Fagales > Betulaceae > Alnus

Characteristics

Trees to 20 m tall; bark dark gray-brown. Branches purplish brown, glabrous, striate; branchlets sparsely pubescent. Buds stipitate, with 2 glabrous, ribbed scales. Petiole 1.2-2.2 cm, slender, densely pubescent in furrow; leaf blade elliptic or oblong-lanceolate, rarely ovate-oblong, 6-12 × 2-5 cm, abaxially bearded in axils of lateral veins, adaxially subglabrous, base rounded or broadly cuneate, margin irregularly minutely serrate, apex acuminate or acute; lateral veins 6 or 7 on each side of midvein. Female inflorescence 1, or 2-4 in a raceme, ellipsoid, 1-2.5 cm; peduncle 3-5 mm, robust; bracts 3-4 mm, woody, base cuneate, apex rounded, 5-lobed. Nutlet obovate, 2-3 mm, with papery wings 1/4-1/3 as wide as nutlet. Fl. May-Jun, fr. Jul-Sep.
Life form -
Growth form tree
Growth support free-standing
Foliage retention deciduous
Sexuality monoecy
Pollination anemogamy
Spread -
Mature width (meter) -
Mature height (meter) 18.5
Root system -
Rooting depth (meter) -
Root diameter (meter) 0.6
Flower color
Blooming months
JanFebMar
AprMayJun
JulAugSep
OctNovDec
Fruit color
Fruiting months
JanFebMar
AprMayJun
JulAugSep
OctNovDec
Nitrogen fixer frankia
Photosynthetic pathway -

Environment

It is typically found forming pure stands on sun-facing slopes of riverbeds, in wet or exposed places and along newly built highways; at elevations up to 2,900 metres.
Light 7-9
Soil humidity -
Soil texture -
Soil acidity 2-8
Soil nutriment -
Hardiness (USDA) 8-9

Usage

Uses construction material wood
Edible -
Therapeutic use -
Human toxicity -
Animal toxicity -

Cultivation

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

Images

Alnus formosana unspecified picture
Alnus formosana unspecified picture

Distribution

Alnus formosana world distribution map, present in China and Taiwan, Province of China

Conservation status

Alnus formosana threat status: Least Concern

Identifiers

LSID urn:lsid:ipni.org:names:107662-1
WFO ID wfo-0000945032
COL ID C2PW
BDTFX ID -
INPN ID -
Wikipedia (EN) Link
Wikipedia (FR)

Synonyms

Alnus formosana Alnus japonica var. formosana Alnus maritima var. formosana