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one-seed pussypaws

Tweedy's pussypaws

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

2 or more from each rosette, spreading to ascending, to 50 cm.

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

Leaves

basal and cauline;

basal in single, prostrate rosette, blade spatulate, 0.5–15 cm;

cauline leaves smaller.

basal, in loose rosettes;

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

Inflorescences

umbellate, rarely paniculate cymes, usually open.

racemose, 1–5(–8)-flowered.

Flowers

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.

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

globose, 2–3.5 mm;

valves 2.

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

valves 3–4, splitting from base toward apex.

Seeds

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

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

2n

= 46, 92.

Cistanthe monosperma

Cistanthe tweedyi

Phenology Flowering Apr–Sep. Flowering May–Jul.
Habitat Dry, sandy or gravelly soils Well-drained granitic talus slopes and ledges, often in ponderosa pine duff
Elevation 300-3500 m (1000-11500 ft) 600-2200 m (2000-7200 ft)
Distribution
from FNA
CA; NV; OR; Mexico (Baja California)
[WildflowerSearch map]
from FNA
WA; BC
Discussion

Of conservation concern.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Source FNA vol. 4, p. 463. FNA vol. 4, p. 464.
Parent taxa Portulacaceae > Cistanthe Portulacaceae > Cistanthe
Sibling taxa
C. ambigua, C. maritima, C. monandra, C. parryi, C. pulchella, C. pygmaea, C. quadripetala, C. rosea, C. tweedyi, C. umbellata
C. ambigua, C. maritima, C. monandra, C. monosperma, C. parryi, C. pulchella, C. pygmaea, C. quadripetala, C. rosea, C. umbellata
Synonyms Calyptridium monospermum, Spraguea monosperma, Spraguea pulcherrima Calandrinia tweedyi, Lewisia tweedyi, Lewisiopsis tweedyi
Name authority (Greene) Hershkovitz: Phytologia 68: 267. (1990) (A. Gray) Hershkovitz: Phytologia 68: 268. (1990)
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