Cistanthe tweedyi

(A. Gray) Hershkovitz

Phytologia 68: 268. 1990.

EndemicConservation concern
Basionym: Calandrinia tweedyi A. Gray Proc. Amer. Acad. Arts 22: 277. 1887
Synonyms: Lewisia tweedyi (A. Gray) B. L. Robinson Lewisiopsis tweedyi (A. Gray) Govaerts
Treatment appears in FNA Volume 4. Treatment on page 464. Mentioned on page 460, 461.

Plants perennial, taprooted; caudex short-branching. Stems 1 or more from each rosette, 10–20 cm, bracts scattered proximally, ovatelanceolate, 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.


Phenology: Flowering May–Jul.
Habitat: Well-drained granitic talus slopes and ledges, often in ponderosa pine duff
Elevation: 600-2200 m

Discussion

Of conservation concern.

Lower Taxa

None.

"narrowing" is not a number. "broad" is not a number.

... more about "Cistanthe tweedyi"
Walter A. Kelley +, John M. Miller +  and John G. Packer +
(A. Gray) Hershkovitz +
Calandrinia tweedyi +
occasionally dentate;crisped +
elliptic-lanceolate +  and ovate or oblanceolate +
6 cm60 mm <br />0.06 m <br /> (15 cm150 mm <br />0.15 m <br />) +
subtending +
ovatelanceolate +
unequal +
circumscissile +
0.7 cm7 mm <br />0.007 m <br /> (?) +  and 1 cm10 mm <br />0.01 m <br /> (?) +
short-branching +
B.C. +  and Wash. +
600-2200 m +
Well-drained granitic talus slopes and ledges, often in ponderosa pine duff +
not articulate +
subrosulate +, rosulate +, alternate +, subopposite +  and opposite +
not reflexed +
plurilocular +
2 cm20 mm <br />0.02 m <br /> (6 cm60 mm <br />0.06 m <br />) +
white +, salmon-pink +  and yellowish +
distinct +
2.5 cm25 mm <br />0.025 m <br /> (4 cm40 mm <br />0.04 m <br />) +
Flowering May–Jul. +
hershkovitz1992a +
fibrous +  and fleshy +
strophiolate +
red +  and dark brownish +
12 +  and 35 +
sculptured +  and smooth +
suborbicular +  and reniform +
2 cm20 mm <br />0.02 m <br /> (?) +
persistent +
distinct +
unequal +
0.9 cm9 mm <br />0.009 m <br /> (1 cm10 mm <br />0.01 m <br />) +
Endemic +  and Conservation concern +
10 +  and 23 +
branched +  and simple +
decumbent +  and erect +
10 cm100 mm <br />0.1 m <br /> (20 cm200 mm <br />0.2 m <br />) +
Lewisia tweedyi +  and Lewisiopsis tweedyi +
Cistanthe tweedyi +
Cistanthe +
species +
not deciduous +
3 (?) +  and 4 (?) +