Oreostemma alpigenum var. haydenii

(T. C. Porter) G. L. Nesom

Phytologia 74: 313. 1993.

Common names: Hayden’s mountaincrown
IllustratedEndemic
Basionym: Aster haydenii Porter in F. V. Hayden, Prelim. Rep. U.S. Geol. Surv. Montana, 485. 1872
Synonyms: Aster alpigenus var. haydenii (Porter) Cronquist Oreostemma alpigenum subsp. haydenii (Porter) Semple Oreostemma haydenii
Treatment appears in FNA Volume 20. Treatment on page 360.

Stems 4–10(–15) cm. Basal leaf blades linear-oblanceolate to narrowly oblanceolate, (30–)40–90(–120) × (1–)2–4(–6) mm, apices acute. Cypselae strigose only distally.


Phenology: Flowering (Jun–)Jul–Sep.
Habitat: Rocky slopes, talus, ridges, usually in alpine tundra, sometimes in clearings in pine-fir or pine-spruce woods, sometimes around lake edges or near snow banks, usually in drier sites
Elevation: 2600–3300 m

Discussion

Selected References

None.

Lower Taxa

None.
Guy L. Nesom +
(T. C. Porter) G. L. Nesom +
Aster haydenii +
Hayden’s mountaincrown +
Idaho +, Nev. +, Oreg. +  and Wyo. +
2600–3300 m +
Rocky slopes, talus, ridges, usually in alpine tundra, sometimes in clearings in pine-fir or pine-spruce woods, sometimes around lake edges or near snow banks, usually in drier sites +
Flowering (Jun–)Jul–Sep. +
Illustrated +  and Endemic +
Aster alpigenus var. haydenii +, Oreostemma alpigenum subsp. haydenii +  and Oreostemma haydenii +
Oreostemma alpigenum var. haydenii +
Oreostemma alpigenum +
variety +