Difference between revisions of "Isocoma tenuisecta"
Leafl. Bot. Observ. Crit. 1: 169. 1906.
Common names: Shrine jimmyweed burroweed
Illustrated
Synonyms: Haplopappus tenuisectus (Greene) S. F. Blake ex L. D. Benson
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|tribe=Asteraceae tribe Astereae | |tribe=Asteraceae tribe Astereae | ||
|genus=Isocoma | |genus=Isocoma | ||
Latest revision as of 19:58, 5 November 2020
Herbage minutely hispidulous to hirtellous or sparsely puberulous (at least distal stems), not resinous. Leaf blades oblong-oblanceolate, 20–35 mm, margins pinnatifid (lobes spreading at right angles, linear to filiform). Involucres 4–6.5 × 2–2.8 mm. Phyllary apices with small, sharply delimited, green resinous area, not aristate, often distinctly thickened and approaching resin pockets, usually gland-dotted. Florets 8–12(–15); corollas 4.5–6 mm. Cypsela ribs not forming hornlike extensions.
Phenology: Flowering Sep–Nov.
Habitat: Sandy or gravelly flats and hills, grasslands, usually matorral or Larrea stands
Elevation: 700–1600 m
Distribution
Ariz., N.Mex., Mexico (Sonora).
Discussion
Some plants approach Isocoma acradenia var. acradenia in leaf and phyllary morphology in southern Arizona, where the ranges of the two taxa overlap.
Selected References
None.
Lower Taxa
None.