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Claytonia megarhiza var. nivalis

alpine springbeauty

Madrean springbeauty, Rocky Mountain Spring beauty, western springbeauty

Habit Plants perennial, with stout, woody caudices; periderm 5–12 mm. Plants perennial, with globose tubers 20–100 mm; periderm 5–10 mm.
Stems

5–25 cm.

2–15 cm.

Leaves

basal leaves sessile, dilated at base into broad, succulent sheath, blade rhombic to oblanceolate, 2–10 × 0.4–2.8 cm, apex obtuse;

cauline leaves sessile, blade oblanceolate, 2–10 × 2–5 mm.

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.

Inflorescences

multibracteate;

bracts subtending pedicels, apex obtuse.

multibracteate, rarely 1-bracteate;

proximalmost bract leaflike, distal bracts reduced to membranous scales.

Flowers

12–20 mm diam;

sepals 6–8 mm;

petals white, pink, or rose, 5–20 × 3–8 mm;

ovules 6.

8–14 mm diam.;

sepals 3–5 mm;

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

ovules 6.

Seeds

2–3 mm diam., shiny and smooth;

elaiosome 1 mm or less.

2–3 mm, shiny and smooth;

elaiosome 1–2 mm.

2n

= 12, 16, 24, 32, 34, 36.

= 16.

Claytonia megarhiza

Claytonia rosea

Phenology Flowering May–Aug. Flowering Feb–May.
Habitat Talus, scree, gravelly slopes Hillsides and mesas of montane ponderosa and Chihuahuan pine and oak belts
Elevation 2000-4000 m (6600-13100 ft) 800-2400 m (2600-7900 ft)
Distribution
from FNA
CA; CO; ID; MT; NM; NV; OR; UT; WA; WY; AB; BC; NT
from FNA
AZ; CO; NM; UT; Mexico
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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.)

Source FNA vol. 4, p. 469. FNA vol. 4, p. 472.
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. rosea, 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. 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
Synonyms C. arctica var. megarhiza, C. megarhiza var. bellidifolia, C. megarhiza var. nivalis C. lanceolata var. rosea
Name authority (A. Gray) Parry ex S. Watson: Smithsonian Misc. Collect 258: 118. (1878) Rydberg: Bull. Torrey Bot. Club 31: 404. (1904)
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