Family: Caryophyllaceae
[Arenaria nuttallii subsp. gracilis (B.L. Rob.) Maguire, more... ]
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Leaves tightly appressed to occasionally arcuate-spreading; blade 5-7 mm, apex spinescent. Flowers: sepals 1(-3)-veined, lanceolate (herbaceous portion lanceolate to often narrowly so), 4-5.7 mm, apex spinescent; petals 0.7-1 times as long as sepals.
Flowering spring-summer. Loose talus, sandy flats, barren rock; 2600-3800 m; Calif., Nev., Oreg.