Isocoma menziesii var. menziesii

Synonyms: Haplopappus venetus subsp. oxyphyllus (Greene) H. M. Hall Isocoma oxyphylla Greene Isocoma veneta var. oxyphylla
Treatment appears in FNA Volume 20. Treatment on page 443. Mentioned on page 442.

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.


Phenology: Flowering (Apr–)Aug–Jan.
Habitat: Chaparral, scrub communities, dunes or sandy flats, sandy arroyos, stream banks, edges of saline ponds, rocky canyon walls
Elevation: 0–400(–1100) m

Distribution

V20-1014-distribution-map.gif

Calif., Mexico (Baja California, Baja California Sur).

Discussion

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.

Selected References

None.

Lower Taxa

None.

Guy L. Nesom +
(Hooker & Arnott) G. L. Nesom +
Pyrrocoma menziesii +
Calif. +, Mexico (Baja California +  and Baja California Sur). +
0–400(–1100) m +
Chaparral, scrub communities, dunes or sandy flats, sandy arroyos, stream banks, edges of saline ponds, rocky canyon walls +
Flowering (Apr–)Aug–Jan. +
Haplopappus venetus subsp. oxyphyllus +, Isocoma oxyphylla +  and Isocoma veneta var. oxyphylla +
Isocoma menziesii var. menziesii +
Isocoma menziesii +
variety +