Isocoma menziesii
Isocoma pluriflora
coastal goldenbush, Menzies' goldenbush, Pacific jimmyweed, white flower goldenbush
rayless goldenrod, southern goldenbush, southern jimmyweed
glabrous or villlous, sometimes stipitate-glandular, not resinous.
usually glabrous or sparsely hispidulous, sometimes densely hirtellous, leaves sometimes stipitate-glandular, never resinous.
blades obovate to spatulate or oblanceolate to nearly linear, 5–40 mm, margins entire or toothed to lobed.
blades oblanceolate to narrowly oblong-oblanceolate or nearly linear, mostly 10–40(–50) mm, margins usually entire (hispidulous-cilate, sometimes also on faces), sometimes shallowly toothed distally (especially along western margin of range; teeth in 1(–3) pairs).
(6–)7–9 × 6–8 mm.
3.2–5.5 × 2.5–4 mm.
(15–)18–25(–28);
corollas 5–7 mm.
(8–)11–17(–21);
corollas 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 yellowish, or if green, then margins scarious, not aristate, gland-dotted, without resin pockets.
ribs not forming apical horns.
ribs not forming hornlike extensions.
= 12, 24.
Isocoma menziesii
Isocoma pluriflora
Varieties 5 (5 in the flora).
(Discussion copyrighted by Flora of North America; reprinted with permission.)
Like other species of Isocoma, I. pluriflora usually is gland-dotted, but scattered plants are stipitate-glandular.
(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
SW CO Wildflowers
