Sisyrinchium idahoense var. idahoense

Endemic
Synonyms: Sisyrinchium birameum Piper Sisyrinchium idahoense var. birameum Sisyrinchium oreophilum
Treatment appears in FNA Volume 26. Treatment on page 370. Mentioned on page 363, 369.

Stems 2–2.5 mm wide, margins denticulate. Spathes: keels denticulate; outer less than 2 times inner, basally connate 3.8–7 mm; inner 20–30 mm. Outer tepals 13–17(–20) mm; filaments bluish violet. 2n = 64, 96.


Phenology: Flowering late spring–summer.
Habitat: Moist meadows, stream banks
Elevation: 0–2200 m

Distribution

V26 757-distribution-map.jpg

B.C., Calif., Idaho, Mont., Oreg., Wash., Wyo.

Discussion

The few dodecaploid populations of var. idahoense in eastern Oregon are morphologically indistinguishable from the far more common octoploid plants.

Selected References

None.

Lower Taxa

None.
Anita F. Cholewa +  and Douglass M. Henderson† +
E. P. Bicknell +
B.C. +, Calif. +, Idaho +, Mont. +, Oreg. +, Wash. +  and Wyo. +
0–2200 m +
Moist meadows, stream banks +
Flowering late spring–summer. +
Bull. Torrey Bot. Club +
Sisyrinchium birameum +, Sisyrinchium idahoense var. birameum +  and Sisyrinchium oreophilum +
Sisyrinchium idahoense var. idahoense +
Sisyrinchium idahoense +
variety +