Sidalcea hickmanii subsp. pillsburiensis |
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Lake Pillsbury checkerbloom |
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Habit | Plants greenish, 0.1–0.4 m, with small, erect, branched caudex and taproot. |
Stems | erect, green, stellate-hairy, hairs appressed, moderately dense, uniform, 0.2–0.5 mm. |
Leaves | stipules wide-lanceolate, 3 × 1.3 mm; petioles of midstem leaves 0.6–2 cm, 1/2 times to as long as or longer than blade; blade broadly flabelliform, usually truncate, sometimes wide-cuneate, unlobed, 0.6–1.5 × 0.7–2.2 cm, margins coarsely crenate, surfaces tufted-stellate-hairy. |
Inflorescences | open, not spiciform, unbranched, to 10 cm, to 10-flowered, proximal flowers solitary, axillary; bracts 2 in proximal flowers, 1 in distal flowers, distinct, oblong, narrow, cupped, 3 × 1.2 mm, narrowest at base, longer than pedicels, much shorter than calyx. |
Pedicels | 2 mm, usually not obscured by bracts; involucellar bractlets 3, oblong, 3 mm, 1/2 as long as calyx. |
Flowers | bisexual; calyx 4–5 mm, to 5.5 mm in fruit, densely stellate-puberulent, hairs 0.1–0.6 mm diam.; petals pale pink, slightly pale-veined, 8–10 mm; staminal column 5 mm, minutely puberulent; anthers white; stigmas (4–)6 or 7. |
Seeds | 1–1.5 mm. |
Schizocarps | 4–5 mm diam.; mericarps usually (4–)6 or 7, 1.5–2 mm, side walls smooth, back and margins with 2–5 corrugations. |
Sidalcea hickmanii subsp. pillsburiensis |
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Phenology | Flowering (Jun–)Jul–Aug. |
Habitat | Chaparral, ephemeral drainages |
Elevation | 700–800 m (2300–2600 ft) |
Distribution |
CA |
Discussion | Subspecies pillsburiensis is known from a single population near Lake Pillsbury, North Coast Ranges, Lake County. It appears to be a dwarf most closely related to subsp. viridis and differing in its lower stature, undivided (non-two-fid) bracts, fewer flowers, and less conspicuous, appressed indument. Of conservation concern. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 6, p. 337. |
Parent taxa | |
Sibling taxa | |
Name authority | S. R. Hill: J. Bot. Res. Inst. Texas 2: 786, figs. 2 – 4. (2008) |
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