Isocoma menziesii

Herbage glabrous or villlous, sometimes stipitate-glandular, not resinous. Leaf blades obovate to spatulate or oblanceolate to nearly linear, 5–40 mm, margins entire or toothed to lobed. Involucres (6–)7–9 × 6–8 mm. Phyllary 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). Florets (15–)18–25(–28); corollas 5–7 mm. Cypsela ribs not forming apical horns.

Distribution

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• Legacy Map

Calif., nw Mexico.

Discussion

Varieties 5 (5 in the flora).

Selected References

None.

Lower Taxa

Isocoma menziesii var. decumbens, Isocoma menziesii var. diabolica, Isocoma menziesii var. menziesii, Isocoma menziesii var. sedoides, Isocoma menziesii var. vernonioides

Key

1	Leaf blades mostly obovate, thick-fleshy, margins coarsely serrate; stems decumbent, prostrate, or pendent; herbage glabrous	Isocoma menziesii 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	Isocoma menziesii 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	Isocoma menziesii 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	Isocoma menziesii 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	Isocoma menziesii var. vernonioides
6	Leaf margins entire or with 1–2 pairs of teeth or shallow lobes distally	Isocoma menziesii var. menziesii
6	At least proximal leaves toothed along most margins	Isocoma menziesii var. vernonioides