Alnus viridis subsp. fruticosa

(Ruprecht) Nyman

Consp. Fl. Eur., 672. 1881

Common names: Siberian alder
Basionyms: Alnus fruticosa Ruprecht Distr. Crypt. Vasc. Ross., 53. 1845
Synonyms: Alnus viridis var. fruticosa (Ruprecht) Regel
Treatment appears in FNA Volume 3.
Shrubs, spreading, to 3(–6) m. Bark gray-brown; lenticels pale. Leaf blade dark green, broadly ovate, 5–8(–10) × 3–6(–7) cm, base rounded to nearly truncate or nearly cordate, margins flat, sharply and densely doubly serrate, apex acute to short-acuminate; surfaces abaxially glabrous to sparsely pubescent, especially on veins, moderately to heavily resin-coated. Inflorescences: staminate catkins 3.5–6 cm. Infructescences 1.2–2 × 0.5–1.2 cm; peduncles 1–3 cm. 2n = 28.

Phenology: Flowering spring.
Habitat: Rocky or sandy coasts, stream banks, lakeshores, and damp, open areas
Elevation: 0–500 m


V3 506-distribution-map.gif

Alta., B.C., N.W.T., Sask., Yukon, Alaska, Calif., Oreg., Wash., n Asia.


This primarily subarctic Asian subspecies has long been mistaken in western North America for Alnus viridis subsp. crispa, which it closely resembles, or for subsp. sinuata (J. J. Furlow 1983b). It can be separated from the former by its larger and more coarsely toothed leaves, and from the latter by its much thicker, mostly single-toothed leaf blades.

Selected References


Lower Taxa


AuthorJohn J. Furlow +
Authority(Ruprecht) Nyman +
BasionymsAlnus fruticosa +
Common nameSiberian alder +
DistributionAlta. +, B.C. +, N.W.T. +, Sask. +, Yukon +, Alaska +, Calif. +, Oreg. +, Wash. + and n Asia. +
Elevation0–500 m +
HabitatRocky or sandy coasts, stream banks, lakeshores, and damp, open areas +
Illustration copyrightFlora of North America Association +
IllustratorJohn Myers +
PhenologyFlowering spring. +
Publication titleConsp. Fl. Eur., +
Publication year1881 +
ReferenceNone +
Source xml grained fna xml/V3/V3 506.xml +
SynonymsAlnus viridis var. fruticosa +
Taxon familyBetulaceae +
Taxon nameAlnus viridis subsp. fruticosa +
Taxon parentAlnus viridis +
Taxon ranksubspecies +
VolumeVolume 3 +