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Alnus viridis (Chaix) Dc.
GREEN ALDER
Sitka Alder; Alnus maximowiczii; Alnus sinuata

Life   Plantae   Dicotyledoneae   Betulaceae   Alnus

Alnus viridis, rugosa
© Les Mehrhoff, 2008-2010 · 3
Alnus viridis, rugosa

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Alnus viridis, rugosa
© Les Mehrhoff, 2008-2010 · 2
Alnus viridis, rugosa
Alnus viridis, rugosa
© Les Mehrhoff, 2008-2010 · 2
Alnus viridis, rugosa

Alnus viridis, rugosa
© Les Mehrhoff, 2008-2010 · 2
Alnus viridis, rugosa
Alnus viridis, rugosa
© Les Mehrhoff, 2008-2010 · 1
Alnus viridis, rugosa
Names
Scientific source:

Supported by

Associates · map
FamilyScientific name @ source (records)
Calosphaeriaceae  Calosphaeria aurata @ BPI (1)
Capnodiaceae  Scorias spongiosa @ BPI (1)
Corticiaceae  Corticium aurantiacum @ BPI (6)

Corticium incarnatum @ BPI (3)
Cyphellaceae  Cyphella fasciculata @ BPI (3)
Dermateaceae  Gloeosporium alneum @ BPI (1)

Gloeosporium cylindrospermum @ BPI (2)
Diaporthaceae  Diaporthe marginalis @ BPI (1)

Phomopsis alnea @ BPI (1)
Erysiphaceae  Erysiphe aggregata @ BPI (2)
Gnomoniaceae  Gnomonia alnea @ BPI (1)

Gnomonia setacea @ BPI (1)

Gnomoniella alnobetulae @ 877585B (1); BPI (3)

Ophiognomonia alni-viridis @ 877585A (1); BPI (1)

Ophiognomonia trientensis @ BPI (2)

Ophiognomonia @ BPI (1)

Plagiostoma @ BPI (1)
Helotiaceae  Tympanis conspersa @ BPI (1)
Hymenochaetaceae  Inonotus radiatus @ BPI (1)
Hypocreaceae  Hypocrea citrina @ BPI (1)
Melampsoraceae  Melampsora alni @ BPI (1)
Melanconidaceae  Melanconis alni @ BPI (6)

Melanconis thelebola @ BPI (3)

Melanconis @ BPI (2)

Melanconium dimorphum @ BPI (1)

Pseudovalsella thelebola @ BPI (1)
Mycocaliciaceae  Phaeocalicium compressulum @ BPI (2)
Mycosphaerellaceae  Mycosphaerella alni-viridis @ BPI (1)

Passalora bacilligera @ BPI (1)

Septoria alnifolia @ BPI (1)

Septoria carisolensis @ BPI (1)
Nectriaceae  Nectria @ BPI (4)
Peniophoraceae  Peniophora aurantiaca @ BPI (9)
Pleosporaceae  Stemphylium magnusianum @ BPI (1)
Pucciniastraceae  Melampsoridium alni @ BPI (1)
Schizoporaceae  Hyphodontia crustosa @ BPI (2)
Steccherinaceae  Irpex obliquus @ BPI (1)
Stereaceae  Gloeocystidiellum leucoxanthum @ BPI (1)
Taphrinaceae  Taphrina robinsoniana @ BPI (1)

Taphrina viridis @ BPI (1)
Trichiaceae  Trichia contorta @ BPI (1)
Tricholomataceae  Helotium virgultorum @ BPI (1)
Valsaceae  Cytospora chrysosperma @ BPI (1)

Valsa melanodiscus @ BPI (3)

Valsa oxystoma @ BPI (1)

Valsa @ BPI (1)

Winterella aurantiaca @ BPI (1)
Vibrisseaceae  Vibrissea decolorans @ BPI (1)
_  Fumago vagans @ BPI (1)

Gloeocystidium leucoxanthum @ BPI (1)

Halonia scutellata @ BPI (1)

Leptothyrium alneum @ BPI (3)

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FNA | Family List | FNA Vol. 3 | Betulaceae | Alnus

7. Alnus viridis (Chaix) de Candolle in J. Lamarck and A. P. de Candolle, Fl. France, ed. 3. 3: 304. 1805.

Betula viridis Chaix, Pl. Vapinc. 70. 1785; Alnus alnobetula (Ehrhart) K. Koch; A . ovata (Schrank) Loddiges

Shrubs , spreading to compact, to 10 m. Bark smooth; lenticels scattered, conspicuous to inconspicuous, small, mostly unenlarged. Winter buds nearly sessile, ovoid, apex acuminate; stalks usually not over 1 mm; scales 4--6, unequal, imbricate. Leaf blade broadly to narrowly ovate or elliptic, 3--11 × 3--8 cm, base rounded, obtuse, or cuneate, sometimes nearly cordate, margins serrulate to coarsely doubly serrate, apex acute to rounded; surfaces abaxially glabrous to tomentose, lightly to heavily resin-coated. Inflorescences: staminate catkins in 1 cluster of 2--4, formed late in growing season before flowering and exposed during winter; pistillate catkins in 1 or more clusters of 2--10, formed season before blooming, enclosed in buds during winter, exposed with new growth in spring. Flowering with new growth in spring. Infructescences ovoid to ellipsoid or nearly cylindric; peduncles relatively long, thin. Samaras elliptic to obovate, wings wider than body, membranaceous.

Subspecies 4 (3 in the flora): southern arctic, subarctic, and n mountainous regions, North America and Asia.

Alnus viridis is distinctive among the alders in its essentially sessile buds with several imbricate scales and in its relatively long, thin, infructescence peduncles. Like the birches, only the staminate catkins are exposed during the winter prior to blooming.

Updated: 2021-04-20 21:59:29 gmt
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