Isocoma menziesii var. vernonioides

(Nuttall) G. L. Nesom

Phytologia70: 101. 1991

Synonyms: Haplopappus venetus vernonioides Isocoma veneta vernonioides
Basionyms: Isocoma vernonioides
Found in FNA Volume 20. Treatment on page 443. Mentioned on page 442.
Stems erect to ascending or decumbent; herbage hirtellous or villoso-pilose or densely gray-tomentose (hairs flattened, vitreous, long) to glabrate, sometimes stipitate-glandular. Leaf blades linear to oblanceolate or spatulate-oblong, 10–40 × 2–6(–9) mm, not thick-fleshy, margins of at least the proximal pinnately lobed or shallowly toothed. Heads in corymbiform arrays. Corollas 5–7 mm. Cypselae 2.3–3.6 mm. 2n = 24.

Phenology: Flowering (Apr–)Jul–Dec.
Habitat: Coastal bluffs and dunes, sandy flats, salt marsh borders, occasionally on dry slopes
Elevation: 5–400 m

Distribution

Calif., Mexico (Baja California).

Discussion

Of conservation concern.

In San Diego and Riverside counties, plants of var. vernonioides produce small leaves that are often nearly glabrous, perhaps reflecting the influence of genes from var. menziesii.

References

None.

AuthorGuy L. Nesom +
BasionymIsocoma vernonioides +
Elevation5–400 m +
HabitatCoastal bluffs and dunes, sandy flats, salt marsh borders, occasionally on dry slopes +
IllustratorBarbara Alongi +
PhenologyFlowering (Apr–)Jul–Dec. +
ReferenceNone +
SynonymHaplopappus venetus vernonioides + and Isocoma veneta vernonioides +
Taxon nameIsocoma menziesii var. vernonioides +
Taxon parentIsocoma menziesii +
Taxon rankvariety +
VolumeVolume 20 +