Cistanthe tweedyi(synonym of Lewisiopsis tweedyi) |
Cistanthe pygmaea |
|
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Tweedy's bitterroot, Tweedy's lewisia, Tweedy's pussypaws |
pygmy pussypaws |
|
Habit | Plants perennial, taprooted; caudex short-branching. | Plants annual, taprooted or roots fibrous. |
Stems | 1 or more from each rosette, 10–20 cm, bracts scattered proximally, ovate-lanceolate, scarious. |
2 or more from each rosette, spreading to erect, leafy, 0.5–8 cm. |
Leaves | basal, in loose rosettes; blade elliptic-lanceolate to ovate or oblanceolate, narrowing to broad petiole, 6–15 cm. |
basal and cauline; basal in single, prostrate rosette; blade spatulate, 0.5–1.5 cm. |
Inflorescences | racemose, 1–5(–8)-flowered. |
paniculate or racemose, often secund, ± dense. |
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, 2–4 mm, fleshy, becoming membranaceous; petals persistent in fruit, 4, white, 3 mm; stamens 1(–3), anther yellow; style absent; stigmas 2; pedicel 1–3 mm. |
Capsules | ovoid, 7–10 mm, dehiscence circumscissile near base; valves 3–4, splitting from base toward apex. |
ovoid, 3–5 mm; valves 2. |
Seeds | 12–35, dark brownish red, suborbicular to reniform, 2 mm, not shiny, warty, strophiolate. |
5–9, black, orbicular, 0.3–0.7 mm, shiny. |
2n | = 46, 92. |
= 44. |
Cistanthe tweedyi |
Cistanthe pygmaea |
|
Phenology | Flowering May–Jul. | Flowering Jun–Jul. |
Habitat | Well-drained granitic talus slopes and ledges, often in ponderosa pine duff | Dry, less often moist, sandy or gravelly soils |
Elevation | 600-2200 m (2000-7200 ft) | 1900-3500 m (6200-11500 ft) |
Distribution |
WA; BC
|
CA |
Discussion | Of conservation concern. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
|
Source | FNA vol. 4, p. 464. | FNA vol. 4, p. 463. |
Parent taxa | Portulacaceae > Cistanthe | Portulacaceae > Cistanthe |
Sibling taxa | ||
Synonyms | Calandrinia tweedyi, Lewisia tweedyi, Lewisiopsis tweedyi | Calyptridium pygmaeum |
Name authority | (A. Gray) Hershkovitz: Phytologia 68: 268. (1990) | (Parish ex Rydberg) Hershkovitz: Phytologi a 68: 268. (1990) |
Web links |