Ivesia baileyi var. beneolens

(A. Nelson & J. F. Macbride) Ertter

Syst. Bot. 14: 236. 1989.

Common names: Owyhee ivesia
Endemic
Basionym: Horkelia beneolens A. Nelson & J. F. Macbride Bot. Gaz. 55: 374. 1913
Treatment appears in FNA Volume 9. Treatment on page 226. Mentioned on page 227, 228.

Basal leaves: sheathing base sparsely glandular abaxially, otherwise glabrous. Pedicels 5–6+ mm at flowering, to 15(–30) mm in fruit. Flowers 5–40, 7–10 mm diam.; epicalyx bractlets narrowly lanceolate, 0.8–1 mm, usually less than 1/2 as long as sepals; hypanthium interior pale green or cream to maroon; sepals (1.2–)1.5–2.5 mm; petals white; filaments white, anther margins reddish. Achenes ± 2 mm, rugose. 2n = 28.


Phenology: Flowering summer.
Habitat: Crevices on north-facing cliffs or similarly protected sites in canyons and rocky outcrops mainly of volcanic origin, in sagebrush communities, conifer woodlands
Elevation: 1000–2600 m

Distribution

V9 340-distribution-map.jpg

Calif., Idaho, Nev., Oreg.

Discussion

Variety beneolens occurs from Harney and Malheur counties, Oregon, to Modoc County, California, and to Elmore, Owyhee, and Twin Falls counties, Idaho, and Elko and Humboldt counties, Nevada. Plants are particularly common on the vertical sides of the river canyons that cut through the Owyhee Plateau. The variety also barely enters the Idaho Batholith on volcanic intrusions along the South Fork of the Boise River.

Selected References

None.

Lower Taxa

None.
Barbara Ertter +  and James L. Reveal +
(A. Nelson & J. F. Macbride) Ertter +
Horkelia beneolens +
Owyhee ivesia +
Calif. +, Idaho +, Nev. +  and Oreg. +
1000–2600 m +
Crevices on north-facing cliffs or similarly protected sites in canyons and rocky outcrops mainly of volcanic origin, in sagebrush communities, conifer woodlands +
Flowering summer. +
Potentilla baileyi +
Ivesia baileyi var. beneolens +
Ivesia baileyi +
variety +