Flora of North America species comparison

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Isocoma tenuisecta

burrow goldenweed, burroweed, shrine jimmyweed
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.
Florets

8–12(–15);

corollas 4.5–6 mm.
Phyllary

apices with small, sharply delimited, green resinous area, not aristate, often distinctly thickened and approaching resin pockets, usually gland-dotted.
Cypsela

ribs not forming hornlike extensions.

Isocoma tenuisecta
Phenology Flowering Sep–Nov.
Habitat Sandy or gravelly flats and hills, grasslands, usually matorral or Larrea stands
Elevation 700–1600 m (2300–5200 ft)
Distribution
from FNA
AZ; NM; Mexico (Sonora)
[WildflowerSearch map]
[BONAP county map]
Discussion

Some plants approach Isocoma acradenia var. acradenia in leaf and phyllary morphology in southern Arizona, where the ranges of the two taxa overlap.

(Discussion copyrighted by Flora of North America; reprinted with permission.)
Source FNA vol. 20, p. 445.
Parent taxa Asteraceae > tribe Astereae > Isocoma
Sibling taxa
I. acradenia, I. arguta, I. azteca, I. coronopifolia, I. drummondii, I. humilis, I. menziesii, I. pluriflora, I. rusbyi
Synonyms Haplopappus tenuisectus
Name authority Greene: Leafl. Bot. Observ. Crit. 1: 169. (1906)
Web links 
Unless otherwise noted, all data comes from the online version of the Flora of North America, who have made most of their content available via a Creative Commons license (CC BY 4.0).



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