Isocoma menziesii
Isocoma tenuisecta
coastal goldenbush, Menzies' goldenbush, Pacific jimmyweed, white flower goldenbush
burrow goldenweed, burroweed, shrine jimmyweed
glabrous or villlous, sometimes stipitate-glandular, not resinous.
minutely hispidulous to hirtellous or sparsely puberulous (at least distal stems), not resinous.
blades obovate to spatulate or oblanceolate to nearly linear, 5–40 mm, margins entire or toothed to lobed.
blades oblong-oblanceolate, 20–35 mm, margins pinnatifid (lobes spreading at right angles, linear to filiform).
(6–)7–9 × 6–8 mm.
4–6.5 × 2–2.8 mm.
(15–)18–25(–28);
corollas 5–7 mm.
8–12(–15);
corollas 4.5–6 mm.
apices green to yellowish, not aristate, sometimes with weakly developed, non- or weakly spinulose projection, gland-dotted, without resin pockets or pockets small, weakly developed (var. decumbens and var. menziesii).
apices with small, sharply delimited, green resinous area, not aristate, often distinctly thickened and approaching resin pockets, usually gland-dotted.
ribs not forming apical horns.
ribs not forming hornlike extensions.
Isocoma menziesii
Isocoma tenuisecta
Varieties 5 (5 in the flora).
(Discussion copyrighted by Flora of North America; reprinted with permission.)
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.)
1. Leaf blades mostly obovate, thick-fleshy, margins coarsely serrate; stems decumbent, prostrate, or pendent; herbage glabrous | var. sedoides |
1. Leaf blades obovate to oblanceolate, usually not thick-fleshy, margins entire or toothed (if so then at least stems densely villous); stems erect to ascending or decumbent; herbage glabrous, villous, tomentose, or stipitate-glandular | → 2 |
2. Herbage essentially glabrous, stipitate-glandular | → 3 |
2. Herbage glabrous, villous, or tomentose, not prominently glandular or glands beneath other vestiture | → 4 |
3. Stems prostrate to decumbent or ± erect; leaves 5–22 × 2–4 mm; heads in corymbiform to loose, paniculiform arrays; cypselae 2.3–3.6 mm; San Diego County southward | var. decumbens |
3. Stems strictly erect; leaves 20–40 × 4–10 mm; heads in corymbiform arrays; cypselae (3.8–)4.5–5 mm; San Benito and Santa Clara counties | var. diabolica |
4. Plants densely tomentose or villous | → 5 |
4. Plants glabrous or glabrate | → 6 |
5. Herbage finely and closely grayish-arachnoid-tomentose; leaf blades narrowly oblanceolate, 5–22 × 2–4 mm, margins entire or with 1–2 pairs of teeth distally | var. decumbens |
5. Herbage hirtellous, villoso-pilose, or densely gray-tomentose (hairs flattened, vitreous, long); leaf blades linear to oblanceolate or spatulate-oblong, 10–40 × 2–6(–9) mm, at least proximal leaves with toothed margins | var. vernonioides |
6. Leaf margins entire or with 1–2 pairs of teeth or shallow lobes distally | var. menziesii |
6. At least proximal leaves toothed along most margins | var. vernonioides |
CA
WildflowerSearch
iNaturalist
USDA Plants Database
