Alnus viridis subsp. sinuata

(Regel) A. Löve & D. Löve

Univ. Colorado Stud., Ser. Biol. 17: 20. 1965

Common names: Sitka alder mountain alder
Basionyms: Alnus viridis var. (d) Regel Bull. Soc. Imp. Naturalistes Moscou 38(3): 422. 1865
Synonyms: Alnus crispa subsp. sinuata (Regel) Hultén Alnus sinuata (Regel) Sargent Alnus sitchensis
Treatment appears in FNA Volume 3.
Shrubs, spreading, to 5(–10) m. Bark light gray to reddish brown; lenticels inconspicuous. Leaf blade light or yellowish green, narrowly to broadly ovate, 4–10 × 3–8 cm, thin, papery, base rounded to cordate, margins flat, sharply and coarsely doubly serrate, apex acuminate; surfaces abaxially glabrous to sparsely pubescent, lightly to moderately resin-coated. Inflorescences: staminate catkins 2.5–13 cm. Infructescences 1.5–2.5 × 0.8–1.3 cm; peduncles 1–3 cm. 2n = 28.

Phenology: Flowering spring.
Habitat: Along gravelly or rocky stream banks, lakeshores, and coasts, on moist rocky slopes, outcrops, in open coniferous woodlands
Elevation: 0–2500 m


V3 671-distribution-map.gif

Alta., B.C., N.W.T., Yukon, Alaska, Calif., Idaho, Mont., Oreg., Wash., Wyo.


Alnus viridis subsp. sinuata is one of the first successional taxa to appear in the northwestern mountains following disruption of the mature vegetation. It often forms dense thickets on avalanche and talus slopes. Sitka alder differs from the two previous subspecies in its paper-thin, light or yellowish green, doubly serrate leaves.

The Bella Coola used Alnus viridis subsp. sinuata medicinally although D. E. Moerman (1986) did not specify the nature of the remedies.

Selected References


Lower Taxa


AuthorJohn J. Furlow +
Authority(Regel) A. Löve & D. Löve +
BasionymsAlnus viridis var. (d) +
Common nameSitka alder + and mountain alder +
DistributionAlta. +, B.C. +, N.W.T. +, Yukon +, Alaska +, Calif. +, Idaho +, Mont. +, Oreg. +, Wash. + and Wyo. +
Elevation0–2500 m +
HabitatAlong gravelly or rocky stream banks, lakeshores, and coasts, on moist rocky slopes, outcrops, in open coniferous woodlands +
Illustration copyrightFlora of North America Association +
IllustratorJohn Myers +
PhenologyFlowering spring. +
Publication titleUniv. Colorado Stud., Ser. Biol. +
Publication year1965 +
ReferenceNone +
Source xml grained fna xml/V3/V3 671.xml +
Special statusEndemic +
SynonymsAlnus crispa subsp. sinuata +, Alnus sinuata + and Alnus sitchensis +
Taxon familyBetulaceae +
Taxon nameAlnus viridis subsp. sinuata +
Taxon parentAlnus viridis +
Taxon ranksubspecies +
VolumeVolume 3 +