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FNA | Family List | FNA Vol. 20 | Asteraceae | Isocoma

3b. Isocoma menziesii (Hooker & Arnott) G. L. Nesom var. diabolica G. L. Nesom, Phytologia. 70: 96. 1991.

Stems strictly erect; herbage glabrous, usually stipitate-glandular, densely viscid, sometimes eglandular. Leaf blades obovate to narrowly oblanceolate or narrowly elliptic-oblanceolate, 20–40 × 4–10 mm, not thick-fleshy, margins of at least the proximal shallowly serrate. Heads in corymbiform arrays. Corollas 6–7 mm. Cypselae (3.8–)4.5–5 mm.

Flowering Aug–Oct. Open slopes and cliffs, mostly in foothill woodlands; 10–400 m; Calif.

Known only from San Benito and Santa Clara counties, var. diabolica occurs in primarily inland, montane habitats. Var. diabolica differs from var. vernonioides in its resinous, usually densely stipitate-glandular vestiture (villous hairs lacking or sparse along the stems), consistently reduced, somewhat bractlike distal cauline leaves, and longer corollas and cypselae.


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