Sidalcea hartwegii |
Sidalcea diploscypha |
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Hartweg's checkerbloom, valley checkerbloom |
fringe checker mallow, fringe checkerbloom |
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Habit | Herbs, annual, 0.1–0.4(–0.6) m, not glaucous, with taproot. | Herbs, annual, 0.2–0.7 m, not glaucous, with taproot. |
Stems | single, erect, unbranched or distally branched, often zigzag, solid, proximally usually glabrous or sparsely stellate-puberulent. |
single, erect, usually branched distally, solid, both short-stellate-puberulent and long soft bristly-hairy, hairs erect. |
Leaves | cauline; stipules deciduous or inconspicuous, sometimes purplish, subulate, 1–1.5(–3) × 0.5–1 mm; petiole 0.5–1.5(–3) cm, usually 1/2 times involucellar bractlets absent. |
basal, early-deciduous, and cauline; mid to distal stem stipules divided into 2–5 filiform or linear segments, involucrelike, 10+ × 1 mm; petiole (4–)6–20(–50) cm, usually 1/2 times to as long as blade; basal leaf blades orbiculate, unlobed, 1–2.5 × 1–2.5 cm, base cordate, margins crenate, apex rounded; cauline leaf blades orbiculate, palmately 5–7-lobed, (1–)2–6 × (1–)2–6 cm, lobes linear distally, sometimes 3-toothed or -lobed, then midtooth or lobe much longer than laterals, margins entire, surfaces bristly-puberulent. |
Inflorescences | erect, dense, calyces overlapping, occasionally short-branched, clusters to 10-flowered, subumbellate to elongate in age, not 1-sided; bracts linear or filiform, palmately 2–7-lobed, 8–12 mm, lobes linear, usually becoming involucrelike, 1–2.5 cm, subequal to or longer than calyx. |
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Pedicels | 1–3 mm, (short branches may easily be mistaken for pedicels); involucellar bractlets absent. |
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Flowers | bisexual or unisexual and pistillate, plants gynodioecious; calyx 8–10(–12) mm, not much enlarging in fruit, stellate-canescent, sparsely ciliate; petals pink to rose-purple or white, pale-veined, often whitened at base, 18–20(–25) mm; stamens: outer filaments incompletely connate, distally distinct, anthers not attached to connate portion of filaments; staminal column 6–7 mm, hairy; anthers white, stalked, aborted in pistillate flowers; stigmas 6 or 7. |
bisexual; calyx 8–12 mm, not much accrescent, lobes often with narrow purple line or spot at lobe base inside, outer surface bristly-hairy and stellate-puberulent, seldom densely glandular, multicellular hairs usually few or absent; petals dark pink to deep purple, veins often paler, darker patch sometimes at base, 20–35 mm; staminal column 4–6 mm, hairy; anthers sessile on rim, white; stigmas 5 or 6. |
Seeds | 1.5–2 mm. |
2 mm. |
Schizocarps | 5–7 mm diam.; mericarps 6 or 7, 2.5–4 mm, sides smooth, margins rugose, back reticulate-veined, deeply pitted especially on top, glabrous or glandular-puberulent, mucro 0.5–0.8(–1) mm. |
6–7 mm diam.; mericarps 5 or 6, sometimes pinkish when fresh, 2.5 mm, glabrous, back minutely hairy, back and sides reticulate-veined, back with prominent midvein, not pitted, mucro absent. |
2n | = 20. |
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Sidalcea hartwegii |
Sidalcea diploscypha |
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Phenology | Flowering (Mar–)Apr–Jun. | Flowering Apr–May(–Jun). |
Habitat | Dry to moist, grassy hillsides, foothill woodlands, vernal pools, often on serpentine | Grasslands, open woodlands, valleys, near vernal pools, usually on serpentine |
Elevation | 30–800(–1000) m (100–2600(–3300) ft) | 0–900 m (0–3000 ft) |
Distribution |
CA
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CA; OR
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Discussion | Sidalcea hartwegii is widespread in California from Tulare to Shasta counties, a range similar to those of the other vernal-pool annuals. It is most easily recognized by its stamen column, on which the anthers are borne on free portions of filaments, unlike in the other annual species and more typical of the perennial species. This helps to support the suggestion that the annual species were separately derived and not part of a single lineage. Sidalcea hartwegii often grows with S. calycosa, from which it can be distinguished also by its rugose rather than deeply longitudinally furrowed dorsal mericarp surfaces. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Sidalcea diploscypha is widespread in central and northern California and occurs also in Douglas County, Oregon, where it is apparently introduced. Young plants, even in flower, may resemble S. keckii, and transitional plants are known; S. diploscypha generally differs from S. keckii by its longer divided bracts, usually entire lobes on its distal stem leaves, simple bristles on the calyx, bristles absent at the standard mucro position on the mericarp, relatively few glandular and multicellular hairs, and generally clustered flowers and fruits. Plants in Colusa, Napa, Solano, and Yolo counties, California, are sometimes hard to distinguish from S. keckii, and vice versa. Some plants in Butte and Lake counties, California, also show some transitional features; none have yet been assigned to S. keckii. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 6, p. 333. | FNA vol. 6, p. 330. |
Parent taxa | ||
Sibling taxa | ||
Synonyms | S. hartwegii var. tenella, S. tenella | Sida diploscypha, S. diploscypha var. minor, S. secundiflora |
Name authority | A. Gray: Mem. Amer. Acad. Arts, n. s. 4: 20. (1849) | (Torrey & A. Gray) A. Gray: Mem. Amer. Acad. Arts, n. s. 4: 19. (1849) |
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