Chaenactis glabriuscula var. orcuttiana

(Greene) H. M. Hall
Univ. Calif. Publ. Bot. 3: 192. 1907.
Common names: Orcutt’s pincushion
Conservation concern
Basionym: Chaenactis tenuifolia var. orcuttiana Greene W. Amer. Sci. 3: 157. 1887
Treatment appears in FNA Volume 21. Treatment on page 413. Mentioned on page 411.

Plants 10–30 cm; proximal indument grayish, sparsely arachnoid. Stems mostly 3–7(–12), ± horizontal; branches proximal and distal. Leaves basal (withering) and cauline, mostly 2–5 cm; largest blades ± plane to 3-dimensional, succulent, mostly 2-pinnately lobed; primary lobes 2–7 pairs, ± congested, ultimate lobes ± plane to involute. Heads mostly 2–5 per stem. Peduncles 1–4 cm. Involucres ± hemispheric. Phyllaries: longest 4.5–6.5(–9) × 1–2 mm; outer predominantly stipitate-glandular and ± villous in fruit. Florets: inner corollas 4.5–5.5 mm. Cypselae 4–5 mm; pappi of 4 scales in 1 series, longest scales mostly 1–2.5 mm, lengths 0.2–0.5 times corollas. 2n = 12.


Phenology: Flowering late Apr–Jun.
Habitat: Coastal dunes and bluffs
Elevation: 0–100 m

Distribution

V21-1036-distribution-map.gif

Calif., Mexico (Baja California).

Discussion

Of conservation concern.

Variety orcuttiana is known along the coast from near Santa Barbara to northwestern Baja California. It appears to intergrade with var. glabriuscula shortly inland.

Selected References

None.

Lower Taxa

None.

James D. Morefield +
(Greene) H. M. Hall +
Chaenactis tenuifolia var. orcuttiana +
Orcutt’s pincushion +
Calif. +  and Mexico (Baja California). +
0–100 m +
Coastal dunes and bluffs +
Flowering late Apr–Jun. +
Univ. Calif. Publ. Bot. +
Conservation concern +
Undefined (tribe Undefined) subtribe Bahiinae +  and Undefined (tribe Undefined) subtribe Palafoxiinae +
Chaenactis glabriuscula var. orcuttiana +
Chaenactis glabriuscula +
variety +