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Lewisiopsis tweedyi

Tweedy's bitterroot, Tweedy's lewisia, Tweedy's pussypaws

Habit Plants perennial, taprooted; caudex short-branching.
Stems

1 or more from each rosette, 10–20 cm, bracts scattered proximally, ovate-lanceolate, scarious.

Leaves

basal, in loose rosettes;

blade elliptic-lanceolate to ovate or oblanceolate, narrowing to broad petiole, 6–15 cm.

Inflorescences

racemose, 1–5(–8)-flowered.

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.

Capsules

ovoid, 7–10 mm, dehiscence circumscissile near base;

valves 3–4, splitting from base toward apex.

Seeds

12–35, dark brownish red, suborbicular to reniform, 2 mm, not shiny, warty, strophiolate.

2n

= 46, 92.

Cistanthe tweedyi

Phenology Flowering May–Jul.
Habitat Well-drained granitic talus slopes and ledges, often in ponderosa pine duff
Elevation 600-2200 m (2000-7200 ft)
Distribution
from FNA
WA; BC
[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.
Parent taxa 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
Synonyms Calandrinia tweedyi, Lewisia tweedyi, Lewisiopsis tweedyi
Name authority (A. Gray) Hershkovitz: Phytologia 68: 268. (1990)
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