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Lewisiopsis tweedyi

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

one-seed pussypaws

Habit Plants perennial, taprooted; caudex short-branching. Plants perennial, taprooted; caudex unbranched (rarely branching).
Stems

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

2 or more from each rosette, spreading to ascending, to 50 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, 0.5–15 cm;

cauline leaves smaller.

Inflorescences

racemose, 1–5(–8)-flowered.

umbellate, rarely paniculate cymes, usually open.

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 to reniform, unequal, 3–8 mm, scarious;

petals 4, rose or pinkish white to white, 3–9 mm;

stamens 3, anther pink or rose;

style exserted, filiform;

stigmas 2.

Capsules

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

valves 3–4, splitting from base toward apex.

globose, 2–3.5 mm;

valves 2.

Seeds

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

1–3, black, orbicular-reniform, 0.7–1.2 mm, shiny.

2n

= 46, 92.

Cistanthe tweedyi

Cistanthe monosperma

Phenology Flowering May–Jul. Flowering Apr–Sep.
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) 300-3500 m (1000-11500 ft)
Distribution
from FNA
WA; BC
[WildflowerSearch map]
[BONAP county map]
from FNA
CA; NV; OR; Mexico (Baja California)
[WildflowerSearch 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. 463.
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. ambigua, C. maritima, C. monandra, C. parryi, C. pulchella, C. pygmaea, C. quadripetala, C. rosea, C. tweedyi, C. umbellata
Synonyms Calandrinia tweedyi, Lewisia tweedyi, Lewisiopsis tweedyi Calyptridium monospermum, Spraguea monosperma, Spraguea pulcherrima
Name authority (A. Gray) Hershkovitz: Phytologia 68: 268. (1990) (Greene) Hershkovitz: Phytologia 68: 267. (1990)
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