Isocoma menziesii var. diabolica

G. L. Nesom
Phytologia 70: 96. 1991.
Treatment appears in FNA Volume 20. Treatment on page 443. Mentioned on page 442.

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.

Phenology: Flowering Aug–Oct.
Habitat: Open slopes and cliffs, mostly in foothill woodlands
Elevation: 10–400 m


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.

Selected References


Lower Taxa