Isocoma rusbyi

Greene

Leafl. Bot. Observ. Crit. 1: 170. 1906

Common names: Rusby’s jimmyweed
Synonyms: Haplopappus rusbyi (Greene) Cronquist
Treatment appears in FNA Volume 20. Treatment on page 444. Mentioned on page 440.
Herbage glabrous, not resinous. Leaf blades narrowly elliptic-oblong to elliptic-obovate, 20–50 mm, margins entire. Involucres (5.5–)6–9.5 × 5–7.5 mm. Phyllary apices yellowish to greenish yellow, not aristate, sparsely or not at all gland-dotted, without resin pockets. Florets 19–25; corollas 5–6.5 mm. Cypsela ribs slightly surpassing apices, forming hornlike extensions. 2n = 12.

Phenology: Flowering Aug–Oct(–Nov).
Habitat: Rocky or sandy soils, sometimes in clay, usually saline, desert shrub communities, sometimes with scattered junipers
Elevation: 700–1500 m

Distribution

V20-1017-distribution-map.gif

Ariz., Colo., N.Mex., Utah.

Discussion

References

None.

Lower Taxa

No lower taxa listed.