Sidalcea elegans |
Sidalcea oregana |
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Del Norte checkerbloom, dwarf checkerbloom |
Oregon checker-mallow, Oregon checkerbloom |
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Habit | Herbs, perennial, 0.2–0.6(–0.8) m, sometimes ± glaucous, with woody taproot or caudex and rhizomes, freely rooting, 20–30 cm × 2–4 mm, often mat-forming, forming clones often 1–8 m2. | Herbs, perennial, (0.3–)0.4–1.5 m, glaucous or not, with short, thick, rather woody taproot and branching caudex, without rhizomes or rhizomelike rootstocks (subsp. valida sometimes with rhizomes). | ||||||||||||||||
Stems | scattered, erect to ascending, base decumbent to erect, usually rooting freely, solid, proximally hairy or glabrate, hairs soft, simple and stellate, distally brittle, easily broken, glabrous-glaucous. |
single or clustered, erect, rarely rooting at base, unbranched or distally branched, proximally usually solid, sometimes hollow in age, base glabrous, coarsely stellate-hairy to long-bristly, or glabrate, hairs usually becoming appressed, simple or stellate. |
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Leaves | mostly basal or cauline 3 or 4 on proximal 1/3 of stem, much reduced; stipules wide-lanceolate to ovate, 3–4 × 1–1.5 mm; petioles of proximal leaves 6–12 cm, 2–4 times as long as blades in basal leaves, those of cauline leaves greatly reduced to 1/2 times or as long as blades; blade rounded to reniform, palmately (3–)5–7-lobed, usually (1–)2–5(–10) × (1–)2–5(–10) cm, apex rounded, surfaces: abaxial harshly stellate-hairy, adaxial usually simple-haired, basal blades shallowly incised, lobes with 3 deep crenations; cauline blades usually deeply 3–5(–7)-lobed nearly to base, lobe margins dentate or entire. |
basal and cauline, basal sometimes deciduous, cauline 3+; stipules usually deciduous, linear to lanceolate, 4–6(–14) × 0.5–1(–2) mm; petioles of basal and proximal leaves (5–)7–10(–35) cm, 3–5 times as long as blades, reduced distally, distalmost leaves sometimes subsessile; blade cordate or reniform-orbiculate, 3–10(–15) × 3–10(–15) cm, base cordate, apex rounded, lobe apex often acute, surfaces glabrous or sparsely hairy, hairs minute, simple, forked, or stellate, proximal usually shallowly palmately 5–7(–9)-lobed, sometimes unlobed with margins crenate; midstem more deeply (3–)5–9-lobed, lobes again palmately or pinnately lobed, distalmost unlobed or 3(–5)-lobed, segments unlobed or deeply lobed, narrow. |
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Inflorescences | ascending, open, calyces not conspicuously overlapping except sometimes in bud, unbranched or few-branched, loosely (3–)5–10(–20)-flowered, not greatly elongated, 1-sided, 10–20 cm; bracts narrowly elliptic, shallowly 2-fid, proximal bracts divided to base and often with leaf remnant between, 3–4 mm, usually shorter than to equaling pedicels. |
erect, usually spiciform, sometimes subcapitate, congested in bud, dense, calyces sometimes conspicuously overlapping in flower and sometimes in fruit, to open and elongate, few-branched or unbranched, 10–20+-flowered, flowers opening and closing sequentially from base to apex, sometimes 3–10 open on same day, not leafy-bracted, not 1-sided, (1.5–)10–30 cm, elongating in flower or fruit; bracts linear to linear-lanceolate, undivided to 2-fid, proximal sometimes divided to base, 4–6(–7) mm, sometimes exceeding flower buds, usually equaling or longer than pedicels, shorter than calyx. |
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Pedicels | 3–4(–10) mm; involucellar bractlets absent. |
1–3(–10) mm; involucellar bractlets absent. |
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Flowers | bisexual or unisexual and pistillate, plants gynodioecious; calyx 7–10 mm, slightly enlarged in fruit, uniformly, coarsely stellate-puberulent (some rays sometimes longer than others); petals dark pink, pale-veined at least when dry, pistillate 10–15(–20) mm, bisexual 20–25(–33) mm; staminal column 4–5 mm, sparsely hairy; anthers white to pale pink; stigmas 6 or 7(or 8). |
bisexual or unisexual and pistillate, plants gynodioecious; calyx usually green, 3.5–10 mm, usually lightly reticulate-veined, glabrous or densely, uniformly stellate-puberulent or bristly, surface often obscured; petals usually overlapping, pink or pink-lavender to dark rose-pink or magenta, not notably pale-veined, pistillate 5–10 mm, bisexual 8–15(–20) mm; staminal column 4–6(–9) mm, hairy; anthers white to pinkish; stigmas 6–9. |
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Seeds | 2 mm. |
1.5–2.5 mm. |
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Schizocarps | 6–7 mm diam.; mericarps 6 or 7(or 8), 3–3.5 mm, back not ribbed, roughened, sides and back strongly reticulate-veined-rugose and pitted (honeycomblike), top minutely glandular-puberulent, mucro 0.8–1 mm. |
4–7 mm diam.; mericarps 6–9, 2–3 mm, sparsely glandular-puberulent, sometimes glabrous, not stellate-hairy, back and margins rounded, smooth or slightly reticulate-veined or pitted, infrequently prominently roughened at least on margins and/or back, mucro 0.1–0.7 mm. |
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2n | = 40, 60. |
= 20, 40, 60. |
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Sidalcea elegans |
Sidalcea oregana |
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Phenology | Flowering (May–)Jun–Jul(–Sep). | |||||||||||||||||
Habitat | Open, dry woodlands, usually on serpentine | |||||||||||||||||
Elevation | 100–200(–900) m (300–700(–3000) ft) | |||||||||||||||||
Distribution |
CA; OR |
CA; ID; MT; NV; OR; UT; WA; WY; BC
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Discussion | Sidalcea elegans has been included within S. malviflora; it is easily distinguished by its relatively long, slender, shallow rhizomes; open, one-sided inflorescences; and thin, brittle stems. It resembles S. glaucescens in its leaves and inflorescence and is easily distinguished by its rhizomes and soft, simple hairs at the stem base. It has been confused with S. asprella, from which it is distinguished by its simple, flexible hairs at the stem base and by its more developed and elongated rhizomes and variable leaves. Sidalcea elegans occurs in northwestern California and southwestern Oregon. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Subspecies 5 (5 in the flora). Sidalcea oregana is variable and parts of it have been treated as distinct species, subspecies, varieties, or extremes of a continuum. The plants are generally characterized by their strictly erect, leafless inflorescences that are congested in bud, their variable, sparsely hairy, lobed leaves that are both basal and cauline, and their usual lack of rhizomes. They often have been characterized and distinguished from the S. malviflora group by smooth mericarps; this feature depends upon the subspecies and is not true of all plants of S. oregana. These are usually mountain plants; some grow at lower elevations toward the northern parts of the range. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Key |
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Source | FNA vol. 6, p. 331. | FNA vol. 6, p. 347. | ||||||||||||||||
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Synonyms | S. malviflora subsp. elegans | Sida oregana | ||||||||||||||||
Name authority | Greene: Cybele Columb. 1: 35. (1914) | (Nuttall ex Torrey & A. Gray) A. Gray: Mem. Amer. Acad. Arts, n. s. 4: 20. (1849) | ||||||||||||||||
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