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Lewisiopsis tweedyi

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
from FNA
WA; BC
[WildflowerSearch map]
[BONAP county map]
from FNA
AZ; CA; Mexico
[WildflowerSearch map]
[BONAP county map]
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
C. ambigua, C. maritima, C. monandra, C. monosperma, C. parryi, C. pulchella, C. pygmaea, C. quadripetala, C. rosea, C. tweedyi, C. umbellata
C. maritima, C. monandra, C. monosperma, C. parryi, C. pulchella, C. pygmaea, C. quadripetala, C. rosea, C. tweedyi, C. umbellata
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)
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