Isocoma menziesii var. decumbens

(Greene) G. L. Nesom

Phytologia 70: 95. 1991.

Conservation concern
Basionym: Isocoma decumbens Greene Leafl. Bot. Observ. Crit. 1: 172. 1906
Synonyms: Haplopappus venetus subsp. furfuraceus (Greene) H. M. Hall Isocoma veneta var. furfuracea (Greene) R. M. Beauchamp
Treatment appears in FNA Volume 20. Treatment on page 442. Mentioned on page 443.

Stems prostrate to decumbent or ± erect; herbage finely and closely grayish-arachnoid-tomentose or glabrous, minutely stipitate-glandular. Leaf blades narrowly oblanceolate, 5–22 × 2–4 mm, not thick-fleshy, margins entire or with 1–2 pairs of teeth distally. Heads in corymbiform to loose, paniculiform arrays. Corollas 5–6.5 mm. Cypselae 2.3–3.6 mm. 2n = 24.

Phenology: Flowering Jul–Nov.
Habitat: Sandy flats or slopes, commonly in disturbed sites
Elevation: 10–50(–200) m



Calif., Mexico (Baja California).


Of conservation concern.

Variety decumbens grows in San Diego County and southward.

Selected References


Lower Taxa

Guy L. Nesom +
(Greene) G. L. Nesom +
Isocoma decumbens +
Calif. +  and Mexico (Baja California). +
10–50(–200) m +
Sandy flats or slopes, commonly in disturbed sites +
Flowering Jul–Nov. +
Conservation concern +
Haplopappus venetus subsp. furfuraceus +  and Isocoma veneta var. furfuracea +
Isocoma menziesii var. decumbens +
Isocoma menziesii +
variety +