Flora of North America species comparison

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Oreostemma alpigenum

alpine aster, mountain crown, tundra aster
Habit Plants 4–40 cm; stems, leaves, and phyllaries densely villous to glabrate, eglandular (at least some hairs always perceptible on distal stems and on proximal portions of phyllaries).
Leaf

blades oblanceolate.
Phyllaries

1-nerved, herbaceous or slightly tawny-indurate proximally;

outer 0.8–1.2 mm wide proximally.

Oreostemma alpigenum
Distribution
from FNA
CA; ID; NV; OR; WA; WY
[WildflowerSearch map]
[BONAP county map]
Discussion

Varieties 3 (3 in the flora).

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Key
1. Plants 5–18(–30) cm; basal leaf blades oblanceolate (30–)60–100(–150) × 6–12 mm, apices obtuse to rounded
var. alpigenum
1. Plants 8–40 or 4–15 cm; basal leaf blades linear-oblanceolate to narrowly oblanceolate, 30–120(–350) × (1–)2–6(–9) mm, apices acute
→ 2
2. Plants (4–)8–40(–70) cm; basal leaf blades (30–)80–120(–350) × (1–)2–6(–9) mm; cypselae strigillose
var. andersonii
2. Plants 4–15 cm; basal leaf blades (30–)40–90(–120) × (1–)2–4(–6) mm; cypselae strigillose only distally
var. haydenii
Source FNA vol. 20, p. 360.
Parent taxa Asteraceae > tribe Astereae > Oreostemma
Sibling taxa
O. elatum, O. peirsonii
Subordinate taxa
O. alpigenum var. alpigenum, O. alpigenum var. andersonii, O. alpigenum var. haydenii
Synonyms Haplopappus alpigenus, Aster alpigenus
Name authority (Torrey & A. Gray) Greene: Pittonia 4: 224. (1900)
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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