Chaenactis artemisiifolia
Chaenactis parishii
artemisia leaf chaenactis, white pincushion
Parish chaenactis, Parish's chaenactis
mostly 5–15+, erect.
basal (withering) and cauline, 3–15(–20) cm;
largest blades ± plane, not succulent;
primary lobes mostly 5–10 pairs, ultimate lobes ± crowded, antrorse, lanceolate to elliptic, plane.
mostly cauline, (1–)2–5 cm;
largest blades lance-ovate or deltate, ± plane, 1-pinnately lobed;
lobes mostly 2–5 pairs, remote, ± plane.
1.5–6 cm.
ascending to erect, 2–8(–20) cm.
± hemispheric, mostly 10–15 mm diam.
± obconic.
paleae 0.
5–7 mm.
7–8.5 mm.
longest 7–10(–12) mm, ± densely villous, not or sparsely glandular;
apices (all) erect, ± green, acute or scarcely acuminate, not aristate, ± plane.
longest 10–13 mm;
outer predominantly arachnoid to closely lanuginose (sparsely, if at all, stipitate-glandular), apices ± squarrose, pliant.
mostly 1–3 per stem.
compressed, 4–7 mm;
pappi 0 or coroniform (of ± 10 scales, longest 0.1–0.5 mm).
4–7 mm;
pappi: longest scales 6–8 mm.
= 16.
= 12.
Chaenactis artemisiifolia
Chaenactis parishii
In the flora area, Chaenactis artemisiifolia is known from the Transverse and Peninsular ranges and seaward valleys of southwestern California. It is fire-adapted; its germination is significantly enhanced by exposure to biomass smoke (J. E. Keeley and C. J. Fotheringham 1998).
Chaenactis lacera Greene, the eighteenth species of the genus, is known from coastal portions (including islands) of the western Vizcaíno Desert in Baja California and Baja California Sur, Mexico. Forms of C. artemisiifolia sometimes resemble C. lacera in coastal southern California (P. Stockwell 1940), where C. lacera could eventually be introduced. Besides the key characteristics above, C. lacera differs from C. artemisiifolia by its largest leaf blades broadly ± elliptic, 2–3-pinnately lobed, ultimate lobes remote, recurved to retrorse, ± linear, involute (leaf blades appearing ± skeletal).
(Discussion copyrighted by Flora of North America; reprinted with permission.)
Of conservation concern.
Chaenactis parishii is sometimes cultivated in rock gardens. It is known from small, isolated populations in the higher Peninsular Ranges of Riverside and San Diego counties and adjacent Baja California. Chaenactis parishii and C. suffrutescens form a species pair well marked by the (usually) subshrubby habit, proximal indument persistent, white, felty, heads relatively large, and largest leaf blades lance-ovate to deltate.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
CA
WildflowerSearch
iNaturalist
USDA Plants Database
