Isocoma tenuisecta
Isocoma drummondii
burrow goldenweed, burroweed, shrine jimmyweed
Drummond's goldenbush, Drummond's jimmyweed
minutely hispidulous to hirtellous or sparsely puberulous (at least distal stems), not resinous.
glabrous, not resinous.
blades oblong-oblanceolate, 20–35 mm, margins pinnatifid (lobes spreading at right angles, linear to filiform).
blades narrowly oblong to oblanceolate-oblong, 13–50 mm, margins usually entire, sometimes distally toothed (shallow teeth in 1–3 pairs).
4–6.5 × 2–2.8 mm.
(5.5–)6.5–8 × 4.5–5.5(–7) mm.
8–12(–15);
corollas 4.5–6 mm.
(18–)22–34;
corollas 5.8–7.5 mm.
apices with small, sharply delimited, green resinous area, not aristate, often distinctly thickened and approaching resin pockets, usually gland-dotted.
apices usually green, not aristate, usually strongly gland-dotted, without resin pockets.
ribs not forming hornlike extensions.
ribs not forming hornlike extensions.
Isocoma tenuisecta
Isocoma drummondii
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.)
WildflowerSearch
iNaturalist
USDA Plants Database
