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Madrean springbeauty, Rocky Mountain Spring beauty, western springbeauty

little spring beauty, pale claytonia, pale spring-beauty, pallid claytonia, serpentine springbeauty

Habit Plants perennial, with globose tubers 20–100 mm; periderm 5–10 mm. Plants annual, with minute, tuberous bodies; periderm absent.
Stems

2–15 cm.

5–10 cm.

Leaves

basal leaves sometimes absent, petiolate, blade linear to narrowly spatulate, 1–7 × 0.4–2 cm, apex acute to obtuse;

cauline leaves petiolate, blade linear, 2–5 cm, apex acute to obtuse.

blades gray, beige, or pink, glaucous;

basal leaf blades linear or spatulate, 1–6 × 0.05–0.5 cm;

cauline leaves sessile, distinct or partially connate into horn shape, blade spatulate, 0.2–4.5 cm, or subperfoliate, blade 0.2–4.5 cm wide.

Inflorescences

multibracteate, rarely 1-bracteate;

proximalmost bract leaflike, distal bracts reduced to membranous scales.

1-bracteate;

bract leaflike, 0.5–15 mm.

Flowers

8–14 mm diam.;

sepals 3–5 mm;

petals pink, rose, or magenta, 8–10 mm;

ovules 6.

3–5 mm diam.;

sepals 1.5–2.5 mm;

petals white or pinkish, 2–5 mm;

ovules 3.

Seeds

2–3 mm, shiny and smooth;

elaiosome 1–2 mm.

0.5–1 mm, tuberculate;

elaiosome inserted in wide notch of seed coat, 0.5–1 mm.

2n

= 16.

= 16, 32, 48.

Claytonia rosea

Claytonia exigua

Phenology Flowering Feb–May.
Habitat Hillsides and mesas of montane ponderosa and Chihuahuan pine and oak belts
Elevation 800-2400 m (2600-7900 ft)
Distribution
from FNA
AZ; CO; NM; UT; Mexico
[WildflowerSearch map]
from FNA
CA; NV; OR; WA; BC
[WildflowerSearch map]
[BONAP county map]
Discussion

Claytonia rosea is morphologically distinct from C. lanceolata based on early cytological and ecological study of the two species by D. K. Halleck and D. Wiens (1966) and the author’s review of type material.

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

Subspecies 2 (2 in the flora).

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

Key
1. Cauline leaves distinct or partially connate into horn shape; petals 2-6 mm
subsp. exigua
1. Cauline leaves perfoliate; petals 2-3 mm
subsp. glauca
Source FNA vol. 4, p. 472. FNA vol. 4, p. 468.
Parent taxa Portulacaceae > Claytonia Portulacaceae > Claytonia
Sibling taxa
C. acutifolia, C. arctica, C. arenicola, C. caroliniana, C. cordifolia, C. exigua, C. gypsophiloides, C. lanceolata, C. megarhiza, C. multiscapa, C. nevadensis, C. ogilviensis, C. palustris, C. parviflora, C. perfoliata, C. rubra, C. sarmentosa, C. saxosa, C. scammaniana, C. sibirica, C. tuberosa, C. umbellata, C. virginica, C. washingtoniana
C. acutifolia, C. arctica, C. arenicola, C. caroliniana, C. cordifolia, C. gypsophiloides, C. lanceolata, C. megarhiza, C. multiscapa, C. nevadensis, C. ogilviensis, C. palustris, C. parviflora, C. perfoliata, C. rosea, C. rubra, C. sarmentosa, C. saxosa, C. scammaniana, C. sibirica, C. tuberosa, C. umbellata, C. virginica, C. washingtoniana
Subordinate taxa
C. exigua subsp. exigua, C. exigua subsp. glauca
Synonyms C. lanceolata var. rosea
Name authority Rydberg: Bull. Torrey Bot. Club 31: 404. (1904) Douglas ex Torrey & A. Gray: Fl. N. Amer. 1: 200. (1838)
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