Difference between revisions of "Isocoma tenuisecta"

Greene

Leafl. Bot. Observ. Crit. 1: 169. 1906.

Common names: Shrine jimmyweed burroweed
Illustrated
Synonyms: Haplopappus tenuisectus (Greene) S. F. Blake ex L. D. Benson
Treatment appears in FNA Volume 20. Treatment on page 445. Mentioned on page 440.
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|publication year=1906
 
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|special status=Illustrated
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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

V20-1023-distribution-map.gif

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.
... more about "Isocoma tenuisecta"
Guy L. Nesom +
Greene +
Shrine jimmyweed +  and burroweed +
Ariz. +, N.Mex. +  and Mexico (Sonora). +
700–1600 m +
Sandy or gravelly flats and hills, grasslands, usually matorral or Larrea stands +
Flowering Sep–Nov. +
Leafl. Bot. Observ. Crit. +
Haplopappus tenuisectus +
Isocoma tenuisecta +
species +