| 词条 | Claytonia nevadensis |
| 释义 |
|genus = Claytonia |species = nevadensis |authority = S.Watson }}Claytonia nevadensis, known by the common names Sierra springbeauty and Sierra Nevada claytonia, is a species of wildflower in the Montiaceae family. The evolutionary relationship of Claytonia nevadensis to other claytonias is a subject of debate and ongoing genetic studies. Sierra springbeauties are diploid with a chromosome base number of x = 7[1][2][3][4] DistributionThe wildflower is endemic to northern California and south-central [Oregon].[2] It is native to the Sierra Nevada as far south as Farewell Gap; and is indigenous to the Sweetwater Range, Trinity Mountains, Inner Klamath Range, southern Cascade Range, and NE to Steens Mountain of the Harney Basin Region of Oregon.[2][3] It grows in subalpine habitats such as scree and gravelly snowmelt stream banks. DescriptionClaytonia nevadensis is a perennial herb growing from a network of fleshy rhizomes with a small horizontal caudex at ground level. It takes the form of a leafy clump with a stem no longer than about 10 centimeters.[3]The thick red-green leaves are oval to spade-shaped and a few centimeters long, not counting the longer petiole of the most basal leaves.[3] The inflorescence is a dense cluster of 2 to 8 flowers which nests in the clump of leaves or arises on a very short stalk. Each flower has five magenta to pink-tinted white petals up to a centimeter long. The bloom period is July to September.[3] References1. ^Miller, J. M. and K. L. Chambers. 2006. Systematics of Claytonia (Portulacaceae). Systematic Botany Monographs 78: 1-236. {{ISBN|0-912861-78-9}} 2. ^1 2 Calflora: Claytonia nevadensis 3. ^1 2 3 4 Jepson eFlora: Claytonia nevadensis 4. ^Flora of North America External links
6 : Claytonia|Endemic flora of California|Flora of the Sierra Nevada (U.S.)|Alpine flora|Plants described in 1876|Taxa named by Sereno Watson |
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