Cistanthe tweedyi(synonym of Lewisiopsis tweedyi) |
Cistanthe ambigua |
|
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Tweedy's bitterroot, Tweedy's lewisia, Tweedy's pussypaws |
dead man's fingers, desert cistanthe, desert pussypaws |
|
Habit | Plants perennial, taprooted; caudex short-branching. | Plants annual, roots fleshy. |
Stems | 1 or more from each rosette, 10–20 cm, bracts scattered proximally, ovate-lanceolate, scarious. |
spreading to erect, 3–18 cm. |
Leaves | basal, in loose rosettes; blade elliptic-lanceolate to ovate or oblanceolate, narrowing to broad petiole, 6–15 cm. |
cauline, not forming basal rosette; blade linear to spatulate, ± terete, 1.5–6 cm, not glaucous. |
Inflorescences | racemose, 1–5(–8)-flowered. |
paniculate with umbel-like clusters, dense, usually not exceeding leaves. |
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. |
pedicellate; sepals ovate, slightly unequal, 2–5 mm, herbaceous, margins white-scarious; petals disarticulate in fruit, 3–5, white, 2–5 mm; stamens 5–10, anther yellow; style present; stigmas 3; pedicel 1–3 mm. |
Capsules | ovoid, 7–10 mm, dehiscence circumscissile near base; valves 3–4, splitting from base toward apex. |
ovoid, 1–4 mm; valves 3. |
Seeds | 12–35, dark brownish red, suborbicular to reniform, 2 mm, not shiny, warty, strophiolate. |
6–15, black, ovoid, 1–2 mm, smooth, shiny, reticulate at 30x, not white-hairy. |
2n | = 46, 92. |
|
Cistanthe tweedyi |
Cistanthe ambigua |
|
Phenology | Flowering May–Jul. | Flowering Nov–Feb. |
Habitat | Well-drained granitic talus slopes and ledges, often in ponderosa pine duff | Sandy washes and slopes, desert shrub communities |
Elevation | 600-2200 m (2000-7200 ft) | 0-500 m (0-1600 ft) |
Distribution |
WA; BC
|
AZ; CA; Mexico
|
Discussion | Of conservation concern. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
|
Source | FNA vol. 4, p. 464. | FNA vol. 4, p. 462. |
Parent taxa | Portulacaceae > Cistanthe | Portulacaceae > Cistanthe |
Sibling taxa | ||
Synonyms | Calandrinia tweedyi, Lewisia tweedyi, Lewisiopsis tweedyi | Claytonia ambigua, Calandrinia ambigua |
Name authority | (A. Gray) Hershkovitz: Phytologia 68: 268. (1990) | (S. Watson) Carolin ex Hershkovitz: Phytologia 68: 269. (1990) |
Web links |