Sidalcea calycosa subsp. calycosa
annual checkerbloom, checker mallow
usually erect, rarely proximally decumbent, rooting.
mostly cauline, basal leaves usually persistent, 1–3;
stipules lanceolate to ovate, 2–5 mm;
petiole of proximalmost leaves often 4–5 times as long as blade, that of distal leaves 1/2 times to as long as blade;
blades: basal unlobed, 2–5 cm wide, margins crenate, distal as in species.
single or multiple from distal nodes;
bracts ovate to wide-elliptic or narrower, sometimes 2-fid, 2–6 mm, shorter than or equaling pedicel, not obscuring calyx, glabrous or ciliate.
4–5 mm.
calyx 4–7 mm;
petals (9–)10–25 mm.
2 mm.
5–9 mm diam.;
mericarps 2.5 mm.
Sidalcea calycosa subsp. calycosa
Subspecies calycosa is typically a spring-flowering, annual, taprooted plant of the vernal pool regions of northern and central California and can be locally common. It is variable in size dependent on local growing conditions; dwarfed or nearly leafless plants are often found.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
CA
WildflowerSearch
iNaturalist
USDA Plants Database
