Chaenactis carphoclinia var. peirsonii

(Jepson) Munz

Man. S. Calif. Bot. 601. 1935.

Common names: Peirson pincushion
EndemicConservation concern
Basionym: Chaenactis peirsonii Jepson Madroño 1: 259. 1929
Treatment appears in FNA Volume 21. Treatment on page 403. Mentioned on page 402.

Plants mostly 40–60 cm. Leaves ± basal, longest 7–10 cm; petioles dilated proximally, ± indurate.

Phenology: Flowering Mar–Apr.
Habitat: Open, rocky or gravelly desert slopes and flats, shrublands
Elevation: 0–200 m


Of conservation concern.

Variety peirsonii is known from the eastern Santa Rosa Mountains and adjacent Salton Sea area near the common border of Imperial, Riverside, and San Diego counties. Unlike var. attenuata, in which it has sometimes been included, var. peirsonii is geographically and morphologically well defined.

Selected References


Lower Taxa

James D. Morefield +
(Jepson) Munz +
Chaenactis peirsonii +
Peirson pincushion +
0–200 m +
Open, rocky or gravelly desert slopes and flats, shrublands +
Flowering Mar–Apr. +
Man. S. Calif. Bot. +
Endemic +  and Conservation concern +
Undefined (tribe Undefined) subtribe Bahiinae +  and Undefined (tribe Undefined) subtribe Palafoxiinae +
Chaenactis carphoclinia var. peirsonii +
Chaenactis carphoclinia +
variety +