Isocoma menziesii var. diabolica

G. L. Nesom

Phytologia70: 96. 1991

Found 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

Distribution

Calif.

Discussion

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.

References

None.

AuthorGuy L. Nesom +
Elevation10–400 m +
HabitatOpen slopes and cliffs, mostly in foothill woodlands +
IllustratorBarbara Alongi +
PhenologyFlowering Aug–Oct. +
ReferenceNone +
Taxon nameIsocoma menziesii var. diabolica +
Taxon parentIsocoma menziesii +
Taxon rankvariety +
VolumeVolume 20 +