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Photo is of parent taxon

dwarf checkerbloom, geranium-leaf checkerbloom, laciniate checker mallow

Habit Plants 0.2–0.8(–1.1) m, with fibrous-woody taproot and often short rootstocks or compact rhizomes.
Stems

erect to ascending, base decumbent, often rooting, short-hirsute and/or stellate-hairy or glabrous proximally, usually more sparsely, softly stellate-hairy distally.

Leaves

basal and cauline, proximal clustered, distal well-spaced;

stipules ovate to lanceolate, 5–12 × 1.5–3(–5) mm;

petioles of basal leaves 15–20(–25) cm, proximalmost often 8–9 times as long as blade, much reduced distally to 1/2 times as long as blade;

blade 2–7 cm wide, surfaces usually sparsely stellate-hairy or hirsute, more densely so abaxially;

basal rounded to reniform, usually shallowly 7-lobed, margins crenate, distal reniform, deeply, ternately lobed and dissected, lobes wide-linear, 1–2 mm wide, total segments usually 13+.

Inflorescences

dense, becoming open and elongate, usually unbranched, often 20+-flowered, 15+ cm in age, proximal flowers and fruits spaced 1+ cm apart;

proximal bracts leaflike, dissected to base, shorter than pedicels, distal bracts linear to ovate, undivided or 2-fid, (2–)4–5 mm, longer than pedicels.

Pedicels

5–15(–30) mm on proximalmost flowers, distal pedicels 2–5 mm.

Flowers

calyx 7–11 mm, sparsely stellate-puberulent and bristly, marginal and vein hairs longest;

petals usually light pink to dark rose, rarely white, usually conspicuously pale-veined especially when dried, pistillate darker, 9–15 mm, bisexual (12–)15–25 mm;

staminal column 6–7 mm;

anthers white to pale yellow;

stigmas (6 or)7 or 8(or -9).

Seeds

2–3 mm.

Schizocarps

5–7 mm diam.;

mericarps (6 or)7 or 8(or 9), 2.5–3.5 mm, glandular-puberulent, usually prominently reticulate-veined-pitted, mucro 0.5 mm.

2n

= 20, 40.

Sidalcea malviflora subsp. laciniata

Phenology Flowering (Feb–)Mar–Jun.
Habitat Grasslands, open foothill woodlands, sometimes serpentine
Elevation 0–700 m (0–2300 ft)
Distribution
from FNA
CA
[BONAP county map]
Discussion

Subspecies laciniata is the most commonly found component of Sidalcea malviflora. It can be distinguished from most of the other subspecies by its deeply incised

leaves with deeply incised lobes. This difference appears to be the only one between it and subsp. malviflora, and they intergrade. In the southern part of its range, subsp. laciniata appears to intergrade with subsp. californica and with S. sparsifolia. C. L. Hitchcock (1957) distinguished the southern plants as var. sancta, with 2n = 20, stating that both varieties pass imperceptibly into one another. Plants in Monterey and San Luis Obispo counties are difficult to determine. Subspecies laciniata is found in the southern North Coast Ranges and central western California, from Lake to San Luis Obispo counties; it is most common in the San Francisco Bay area on foothills.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Source FNA vol. 6, p. 343.
Parent taxa Malvaceae > subfam. Malvoideae > Sidalcea > Sidalcea malviflora
Sibling taxa
S. malviflora subsp. californica, S. malviflora subsp. dolosa, S. malviflora subsp. malviflora, S. malviflora subsp. patula, S. malviflora subsp. purpurea, S. malviflora subsp. rostrata
Synonyms S. malviflora var. sancta, S. scabra
Name authority C. L. Hitchcock: Perenn. Sp. Sidalcea, 29. (1957)
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