The green links below add additional plants to the comparison table. Blue links lead to other Web sites.
enable glossary links
Lewisiopsis tweedyi

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

common pussypaws

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

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

2 or more from each rosette, spreading to decumbent, 1.5–18 cm.

Leaves

basal, in loose rosettes;

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

basal and cauline;

basal withering in fruit, in single, prostrate rosette, blade spatulate, 1–5 cm;

cauline leaf blades spatulate, 1–2(–4) 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.

subsessile;

sepals ovate, unequal, 1–2 mm, herbaceous, margins scarious;

petals (2–)3, pink to reddish, 1–3 mm;

stamens 1(–3), anther yellow;

style absent;

stigmas 2.

Capsules

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

valves 3–4, splitting from base toward apex.

ovoid to cylindric, somewhat falcate, 4–8 mm;

valves 2.

Seeds

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

4–10, black, orbicular, 0.3–0.7 mm, shiny.

Inflor

-escences racemose or paniculate cymes, scorpioid when immature, loose.

2n

= 46, 92.

= 44.

Cistanthe tweedyi

Cistanthe monandra

Phenology Flowering May–Jul. Flowering Mar–Jun.
Habitat Well-drained granitic talus slopes and ledges, often in ponderosa pine duff Open sandy areas, burns
Elevation 600-2200 m (2000-7200 ft) 0-2100 m (0-6900 ft)
Distribution
from FNA
WA; BC
[WildflowerSearch map]
[BONAP county map]
from FNA
AZ; CA; NV; 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. 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. ambigua, C. maritima, C. monosperma, C. parryi, C. pulchella, C. pygmaea, C. quadripetala, C. rosea, C. tweedyi, C. umbellata
Synonyms Calandrinia tweedyi, Lewisia tweedyi, Lewisiopsis tweedyi Calyptridium monandrum
Name authority (A. Gray) Hershkovitz: Phytologia 68: 268. (1990) (Nuttall) Hershkovitz: Phytologia 68: 267. (1990)
Web links