Thelypodium howellii, the Howell's thelypody or Howell's thelypodium, is a rare plant of the Western United States. It is endemic to a relatively small area on the borders of three western States: Oregon, Nevada, and California.
Epilobium ciliatum, known by the common names fringed willowherb, American willowherb, slender willow herb, and northern willow herb is a species of flowering plant in the willowherb family Onagraceae. This species is native to much of North America, southern South America, and East Asia. It is an introduced species in much of Eurasia and Australia.
Caulanthus major is a species of flowering plant in the family Brassicaceae known by the common name slender wild cabbage. It is native to the Great Basin and surrounding regions of the United States, where it grows on dry mountain slopes and similar habitat.
Caulanthus pilosus is a species of flowering plant in the family Brassicaceae known by the common names hairy wild cabbage and chocolate drops. It is native to open, dry habitat in the Great Basin of Nevada, the Eastern slope of the Sierra Nevada to 9,000 ft (2,700 m) and surrounding regions of the United States northward to the SE corner of Oregon. It is an annual or occasionally perennial herb coated in thin hairs, especially toward the base.
Ranunculus andersonii is a species of buttercup known by the common name Anderson's buttercup. It is native to the western United States, including the Great Basin and surrounding regions, where it grows in sagebrush, woodlands, and other habitat. It is a perennial herb producing a basal rosette of thick leaves which are each divided into three double-lobed leaflets at the end of a petiole. The inflorescence arises from the rosette on an erect, leafless stalk usually no more than 20 centimeters tall. It bears one flower with usually five white or red-tinged petals each up to 2 centimeters long with white or pinkish sepals at the base. At the center of the flower are many yellow stamens and pistils. The fruit is an achene, borne in a spherical cluster of 14 or more. It was named after Charles Lewis Anderson by Asa Gray.
Sagina maxima is a species of flowering plant in the family Caryophyllaceae known by the common names stickystem pearlwort and thick-stemmed pearlwort. It is native to the west coast of North America from Alaska to California, where it can be found in many types of sandy and rocky coastal habitat. It is a small, fleshy perennial herb growing in a clump of linear leaves and thick stems. The fleshy, pointed leaves are 1 or 2 centimeters long. The inflorescence is a solitary flower with five sepals and five small white petals. There are two subspecies which differ mainly in the arrangement of hairs on the stem.
Sidalcea glaucescens is a species of flowering plant in the mallow family known by the common name waxy checkerbloom.
Sidalcea hickmanii is a species of flowering plant in the mallow family known generally by the common name chaparral checkerbloom.
Stanleya elata is a species of flowering plant in the family Brassicaceae known by the common name Panamint princesplume. It is native to the desert mountains of eastern California and western Nevada, where it grows in rocky and scrubby habitat types. It may also occur in Arizona. It is a perennial herb producing one or more erect stems reaching about 1.5 meters in maximum height. They are hairless and often waxy in texture. The thick, leathery leaves have lance-shaped or oblong blades with smooth or toothed edges measuring up to 15 centimeters long. They are borne on petioles. The top of the stem is occupied by a long inflorescence which is a dense, snaking raceme of many flowers. Each flower has four narrow, threadlike yellow or whitish petals each about a centimeter long and a millimeter wide. The fruit is a long, thin, wormlike silique which may be 10 centimeters in length. It contains tiny seeds.
Stanleya viridiflora is a species of flowering plant in the family Brassicaceae known as green princesplume and green-flowered prince's plume. It is native to the western United States, where it occurs in sagebrush and plateau habitat, often on rocky calcareous, sandstone, clay, shale, or volcanic soils.
Streptanthus longirostris is a species of flowering plant in the family Brassicaceae, which is known by the common name longbeak streptanthella, or simply streptanthella. It is native to western North America, where it occurs throughout the western United States and the northwestern states of Mexico. It grows in many types of habitat, including deserts, sagebrush, foothill woodlands, sandy flats, chaparral, and scrubby canyons.
Streptanthus glandulosus subsp. albidus is a subspecies of flowering plant in the mustard family known by the common name Metcalf Canyon jewelflower. It is endemic to California, where it is known only from the Central Coast Ranges in the San Francisco Bay Area. It grows in open areas such as grasslands, often on serpentine soils.
Streptanthus howellii is an uncommon species of flowering plant in the mustard family known by the common name Howell's jewelflower. It is endemic to the Klamath Mountains of southern Oregon and northern California. It grows in mountain forests on serpentine soils. It is a perennial herb producing a hairless, often waxy-textured stem up to 70 or 80 centimeters in maximum length. It is generally unbranched. The ephemeral basal leaves have fleshy oval blades with smooth or toothed edges, borne on petioles. Leaves farther up the stem are similar but smaller and narrower, with shorter petioles or none. They do not clasp the stem. Flowers occur at intervals along the upper stem. Each has a calyx of purple sepals under a centimeter long with purple-tipped yellow petals emerging from the tip. The fruit is a thin, smooth, curved silique up to 12 centimeters long.
Streptanthus oliganthus is an uncommon species of flowering plant in the mustard family known by the common name Masonic Mountain jewelflower. It is native to western Nevada and eastern California, where it grows in the rocky hills east of the central Sierra Nevada. Its habitat includes forest, woodland, sagebrush, and mountain talus. It is a rhizomatous perennial herb producing a hairless, waxy, usually unbranched stem up to about 40 or 50 centimeters in maximum height. The basal leaves have lance-shaped, smooth-edged blades up to 10 centimeters long borne on fuzzy to rough-haired petioles. Leaves higher on the stem have shorter blades which may clasp the stem at their bases. Flowers occur at intervals along the upper stem. Each has a bell-shaped calyx of purple sepals no more than a centimeter long. The petals emerging from the tip are reddish purple or purple-tipped. The fruit is a smooth, flat, straight or slightly curved silique up to 8 to 10 centimeters long.
Thelypodium brachycarpum is a species of flowering plant in the mustard family known by the common names shortpod thelypody and short-podded thelypodium. It is native to parts of northern California and southern Oregon, where it grows in several types of habitat, including alkaline wetlands and serpentine soils.
Thelypodium crispum is a species of flowering plant in the mustard family known by the common name crisped thelypody.
Thelypodium flexuosum is a species of flowering plant in the mustard family known by the common name nodding thelypody. It is native to the Great Basin and surrounding plateau habitat in the northwestern United States, from California and Nevada to Idaho.
Thelypodium laciniatum is a species of flowering plant in the mustard family known by the common name cutleaf thelypody. It is native to western North America, particularly the Great Basin and surrounding plateau and foothill habitat, where it grows on dry rocky cliffs and hillsides in sagebrush and scrub, usually below 2,400 metres (8,000 ft) elevation.
Thelypodium milleflorum is a species of flowering plant in the mustard family known by the common names manyflower thelypody and many-flowered thelypodium. It is native to western North America, particularly the Great Basin and surrounding plateau, desert, and foothill habitat, where it grows in sagebrush and scrub.
Thelypodium stenopetalum is a rare species of flowering plant in the mustard family known by the common names slenderpetal thelypody, slender-petaled thelypodium and slender-petaled mustard. It is endemic to the San Bernardino Mountains of southern California, where it is known from only three or four extant occurrences in moist mountain meadows near Big Bear Lake. Its remaining habitat is considered seriously threatened and the plant is a federally listed endangered species in the United States.
