Cistanthe tweedyi(synonym of Lewisiopsis tweedyi) |
Cistanthe umbellata |
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Tweedy's bitterroot, Tweedy's lewisia, Tweedy's pussypaws |
Mt. Hood pussypaws |
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Habit | Plants perennial, taprooted; caudex short-branching. | Plants perennial, taprooted; caudex branching. |
Stems | 1 or more from each rosette, 10–20 cm, bracts scattered proximally, ovate-lanceolate, scarious. |
1 from each rosette, ascending to erect, to 60 cm. |
Leaves | basal, in loose rosettes; blade elliptic-lanceolate to ovate or oblanceolate, narrowing to broad petiole, 6–15 cm. |
basal in 2–many prostrate rosettes, blade spatulate, (0.5–)2–7(–15) cm; cauline leaves usually absent. |
Inflorescences | racemose, 1–5(–8)-flowered. |
umbellate or subumbellate, dense, globose, 1–2 cm diam. |
Flowers | pedicellate; sepals broadly ovate, 9–10 mm, scarious; petals 7–9(–12), salmon-pink to yellowish, rarely white, 25–40 mm; stamens 10–23, anther yellow; style present; stigmas 3; pedicel 20–60 mm. |
subsessile; sepals orbiculate, equal, 3–8 mm, scarious; petals 4, white, 3–8 mm; stamens 3, anther red or yellow; style exserted, filiform; stigmas 2. |
Capsules | ovoid, 7–10 mm, dehiscence circumscissile near base; valves 3–4, splitting from base toward apex. |
globose, 2–3 mm; valves 2. |
Seeds | 12–35, dark brownish red, suborbicular to reniform, 2 mm, not shiny, warty, strophiolate. |
1–8, black, orbicular-reniform, 0.7–1.2 mm, shiny. |
2n | = 46, 92. |
= 44. |
Cistanthe tweedyi |
Cistanthe umbellata |
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Phenology | Flowering May–Jul. | Flowering May–Oct. |
Habitat | Well-drained granitic talus slopes and ledges, often in ponderosa pine duff | Dry sandy or gravelly soils |
Elevation | 600-2200 m (2000-7200 ft) | 1500-4300 m (4900-14100 ft) |
Distribution |
WA; BC
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CA; ID; MT; NV; OR; UT; WA; WY; BC
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Discussion | Of conservation concern. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Source | FNA vol. 4, p. 464. | FNA vol. 4, p. 464. |
Parent taxa | Portulacaceae > Cistanthe | Portulacaceae > Cistanthe |
Sibling taxa | ||
Synonyms | Calandrinia tweedyi, Lewisia tweedyi, Lewisiopsis tweedyi | Spraguea umbellata, Calyptridiumu mbellatum, Calyptridiumu umbellatum var. caudiciferum, Spraguea umbellata var. caudicifera |
Name authority | (A. Gray) Hershkovitz: Phytologia 68: 268. (1990) | (Torrey) Hershkovitz: Phytologia 68: 268. (1990) |
Web links |
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