Claytonia megarhiza

(A. Gray) Parry ex S. Watson

Smithsonian Misc. Collect 258: 118. 1878.

Common names: Fell-fields claytonia
Endemic
Basionym: Claytonia arctica var. megarhiza A. Gray Amer. J. Sci. Arts, ser. 2, 33: 406. 1862
Synonyms: Claytonia megarhiza var. bellidifolia (Rydberg) C. L. Hitchcock Claytonia megarhiza var. nivalis (English) C. L. Hitchcock
Treatment appears in FNA Volume 4. Treatment on page 469. Mentioned on page 466.

Plants perennial, with stout, woody caudices; periderm 5–12 mm. Stems 5–25 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. Inflorescences multibracteate; bracts subtending pedicels, apex obtuse. Flowers 12–20 mm diam; sepals 6–8 mm; petals white, pink, or rose, 5–20 × 3–8 mm; ovules 6. Seeds 2–3 mm diam., shiny and smooth; elaiosome 1 mm or less. 2n = 12, 16, 24, 32, 34, 36.


Phenology: Flowering May–Aug.
Habitat: Talus, scree, gravelly slopes
Elevation: 2000-4000 m

Distribution

V4 933-distribution-map.gif

Alta., B.C., N.W.T., Calif., Colo., Idaho, Mont., Nev., N.Mex., Oreg., Utah, Wash., Wyo.

Discussion

Selected References

None.

Lower Taxa

None.

"less" is not a number.

... more about "Claytonia megarhiza"
36 +, 34 +, 32 +, 24 +, 16 +  and 12 +
John M. Miller +
(A. Gray) Parry ex S. Watson +
Claytonia arctica var. megarhiza +
0.2 cm2 mm <br />0.002 m <br /> (1 cm10 mm <br />0.01 m <br />) +
occasionally dentate;crisped +
oblanceolate +  and rhombic +
0.2 cm2 mm <br />0.002 m <br /> (?) +  and 0.5 cm5 mm <br />0.005 m <br /> (?) +
scale-like +
membranous +
whorled +  and opposite +
connate +, or +  and distinct +
3 (?) +  and 2 (?) +
Fell-fields claytonia +
Alta. +, B.C. +, N.W.T. +, Calif. +, Colo. +, Idaho +, Mont. +, Nev. +, N.Mex. +, Oreg. +, Utah +, Wash. +  and Wyo. +
2000-4000 m +
1.2 cm12 mm <br />0.012 m <br /> (2 cm20 mm <br />0.02 m <br />) +
Talus, scree, gravelly slopes +
terminal +  and axillary +
not articulate +
subrosulate +, rosulate +, alternate +, subopposite +  and opposite +
cauline +  and basal +
plurilocular +
globose +
0.5 cm5 mm <br />0.005 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
rose +, pink +  and white +
connate +  and distinct +
5mm;20mm +
0.3 cm3 mm <br />0.003 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
Flowering May–Aug. +
Smithsonian Misc. Collect +
capillary +
dispersed +
3 +  and 6 +
smooth +  and tuberculate +
rounded +
persistent +
unequal +
0.6 cm6 mm <br />0.006 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
succulent +
decumbent +  and erect +
5 cm50 mm <br />0.05 m <br /> (25 cm250 mm <br />0.25 m <br />) +
Claytonia megarhiza var. bellidifolia +  and Claytonia megarhiza var. nivalis +
Claytonia megarhiza +
Claytonia +
species +
not deciduous +
fleshy +  and succulent +
8 +, 7 +, 6 +  and 5 +