| Chaenactis thompsonii | |
|---|---|
 | |
Scientific classification  | |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Clade: | Asterids |
| Order: | Asterales |
| Family: | Asteraceae |
| Genus: | Chaenactis |
| Species: | C. thompsonii |
| Binomial name | |
| Chaenactis thompsonii | |
Chaenactis thompsonii is a North American species of flowering plants in the aster family known by the common name Thompson's pincushion and native to Washington State. [1] [2] [3] [4] [5]
Chaenactis thompsonii is endemic to the Wenatchee Mountains of the north-central Cascades in the US State of Washington. It grows in full sun and is strongly associated with rocky serpentine soils. Along with Lomatium cuspidatum, Oreocarya thompsonii, and Poa curtifolia, it is a strong indicator for serpentine in the area. [1] [6] [4]
Chaenactis thompsonii is a perennial up to 30 cm (12 inches) tall, usually not forming extensive clumps or mats. Each vegetative branch may produce 1-3 flower heads each containing white or pale lavender disc florets but no ray florets, with wooly (tomentose) flower stalks (peduncles) and floral bracts (involucre). [1] [4] [7] Leaves are sparsely woolly and singly pinnate with 2-5 pairs of generally flat entire lobes from multiple stems. [1] [4] The similar and much more widespread Chaenactis douglasii usually has doubly pinnate leaves and does not grow in serpentine soils. [4]
Allium validum is a species of flowering plant commonly called swamp onion, wild onion, Pacific onion, or Pacific mountain onion. It is native to the Cascade Range, to the Sierra Nevada, the Rocky Mountains, and other high-elevation regions in California, Oregon, Washington, Nevada, Idaho and British Columbia. It is a perennial herb and grows in swampy meadows at medium and high elevations.
Allium unifolium, the one-leaf onion or American garlic, is a North American species of wild onion. It is native to the coastal mountain ranges of California, Oregon, and Baja California. It grows on clay soils including serpentine, at elevations up to 1100 m.
Chaenactis is a genus of plants in the daisy family which are known generally as pincushions or dustymaidens.
Allium amplectens, the narrowleaf onion, is a species of onion plant. It is native to the West coast of the United States, in Oregon, Washington State and California, also British Columbia in Canada. It grows in woods and especially in clay and serpentine soils.
Anemone drummondii is a species of flowering plant in the buttercup family Ranunculaceae, known by the common name Drummond's anemone. It is native to mountains in western North America.
Chaenactis fremontii, with the common names Frémont's pincushion and desert pincushion, is a species of annual wildflower in the daisy family. Both the latter common name, and the specific epithet are chosen in honor of John C. Frémont.
Chaenactis artemisiifolia, with the common name white pincushion, is a species of flowering plant in the daisy family. It is native to the coastal Peninsular Ranges of Southern California and Baja California, in the chaparral and woodlands.
Claytonia megarhiza is a species of wildflower in the family Montiaceae known by the common names fell-fields claytonia and alpine springbeauty. The specific epithet megarhiza is Greek for "large roots".
Chaenactis suffrutescens is a species of flowering plant in the aster family known by the common name Shasta chaenactis.
Erigeron tener is a North American species of flowering plant in the family Asteraceae known by the common name slender fleabane. It is native to the western United States, largely in the Great Basin, in the states of California, Arizona, Nevada, Utah, Oregon, Wyoming, Idaho, and Montana.
Lomatium cuspidatum is a perennial herb of the family Apiaceae, native to the U.S. state of Washington. It is found primarily on open rocky slopes in the Wenatchee Mountains, strongly associated with serpentine scree and soils.
Polystichum lemmonii is a species of fern known by the common names Lemmon's holly fern and Shasta fern. It is native to western North America from the Sierra Nevada of California north to Washington. It is also known from British Columbia, where there is a single occurrence in the mountains above the Okanagan Valley.
Woodsia scopulina, common name Rocky Mountain woodsia, is a deciduous perennial fern in the family Woodsiaceae.
Allium dictuon is a species of wild onion known by the common name Blue Mountain onion. It is native to a small section of the Blue Mountains straddling the border between southeastern Washington and northeastern Oregon in the United States. It grows in Columbia, Garfield and Walla Walla Counties in Washington, plus Umatilla and Wallowa Counties in Oregon.
Allium douglasii, the Douglas onion, is a plant species native to northeastern Oregon, eastern Washington, and northern Idaho. It grows in shallow soils at elevations of 400–1,300 m (1,300–4,300 ft).
Canbya candida is a tiny, white flowered annual plant in the genus Canbya of the poppy family. It is found in the western Mojave Desert of Southern California. It grows 1–3 cm tall. Its leaves are 5–9 mm long. The flowers are borne in leaf axils, and have 5–7 white petals that are each 3–4 mm long, and 6-9 stamens.
Chaenactis nevii is a North American species of flowering plants in the aster family known by the common name John Day pincushion. It is found only in the John Day Basin area in the US State of Oregon.
Chaenactis evermannii is a North American species of flowering plants in the aster family known by the common name Evermann's pincushion. It is found only at high altitudes in the mountains in the central part of the US State of Idaho.
Oreocarya thompsonii is a species of flowering plant in the genus Oreocarya with the common name Thompson's cryptantha.
Castilleja elmeri is a species of flowering plant in the family Orobanchaceae with the common name Elmer's paintbrush. As with most Castilleja species, this is a facultative root hemiparasite and will usually be seen growing close to a host plant.
