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

3c. Isocoma menziesii (Hooker & Arnott) G. L. Nesom var. menziesii

Haplopappus venetus (Kunth) S. F. Blake subsp. oxyphyllus (Greene) H. M. Hall; Isocoma oxyphylla Greene; I. veneta (Kunth) Greene var. oxyphylla (Greene) R. M. Beauchamp

Stems erect or spreading, rarely decumbent; herbage glabrous, eglandular. Leaf blades narrowly oblanceolate, 15–30(–40) × 3–8 mm, not thick-fleshy, margins entire or with 1–2 pairs of teeth or shallow lobes distally. Heads in corymbiform arrays. Corollas 5.5–6.5. Cypselae 2.5–3.5 mm. 2n = 24.

Flowering (Apr–)Aug–Jan. Chaparral, scrub communities, dunes or sandy flats, sandy arroyos, stream banks, edges of saline ponds, rocky canyon walls; 0–400(–1100) m; Calif.; Mexico (Baja California, Baja California Sur).

Varieties vernonioides and menziesii appear to be completely intergrading. Glabrous or glabrate plants with entire leaves are identified as var. menziesii; those with leaves prominently toothed, as well as plants prominently villous but with more weakly toothed leaves, are identified as var. vernonioides.


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