Isocoma rusbyi
Leafl. Bot. Observ. Crit. 1: 170. 1906.
Common names: Rusby’s jimmyweed
Synonyms: Haplopappus rusbyi (Greene) Cronquist
Revision as of 00:27, 27 July 2019 by FNA>Volume Importer
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
Ariz., Colo., N.Mex., Utah.
Discussion
Selected References
None.
Lower Taxa
None.