Psathyrotes is a genus of North American plants in the sneezeweed tribe within the sunflower family. It contains annual and perennial forbs and low subshrubs native to dry areas of southwestern North America. Common names include turtleback, brittlestem, and fanleaf.
Amsonia tomentosa is a species of flowering plant native to the southwestern United States and northern Mexico (Chihuahua). Its common names include woolly bluestar and gray amsonia.
Coleogyne ramosissima or blackbrush, is a low lying, dark grayish-green, aromatic, spiny, perennial, soft wooded shrub, native to the deserts of the southwestern United States. It is called blackbrush because the gray branches darken when wet by rains. It is in the rose family (Rosaceae), and is the only species in the monotypic genus Coleogyne.
Lagophylla ramosissima is a species of flowering plant in the family Asteraceae. It is known by the common name branched hareleaf, or branched lagophylla. It is native to the western United States where it can be found in many types of habitat, especially in dry areas. This is an annual herb producing spindly, erect stems which are variable in height. The leaves on the lower part of the plant are up to 12 centimeters long and fall off the plant early on in the season. The upper leaves are smaller and have woolly, glandular surfaces. The inflorescence is sparsely flowered in flower heads which open in the evening and close early in the morning. Each small head has five short light yellow ray florets with lobed tips, and six yellow disc florets. The fruit is an achene a few millimeters long with no pappus.
Arctostaphylos pajaroensis is a species of manzanita known by the common name Pajaro manzanita. It is endemic to California, where it is known mainly from Monterey County.
Atriplex lentiformis is a species of saltbush.
Brickellia incana is a North American species of flowering plant in the family Asteraceae known by the common name woolly brickellbush. It is native to the Mojave Desert and Sonoran Desert in the southwestern United States, in California, Nevada, and Arizona.
Crepis intermedia is a North American species of flowering plant in the family Asteraceae known by the common name limestone hawksbeard. It is native to the Pacific Northwest, Columbia Plateau, Great Plains and Southwestern regions of western North America.
Lessingia lemmonii is a species of flowering plant in the family Asteraceae known by the common name Lemmon's lessingia. It is native to the western United States around the intersection of Nevada, Arizona, and California, where it grows in desert and other habitat with sandy soils. This is an annual herb producing gray-green woolly stems in a low clump just a few centimeters high to a relatively erect 40 centimeters tall. The leaves are narrow and small, under 2 centimeters long, with much larger leaves appearing around the base of the young plant and withering away early. The flower heads appear singly or in open arrays. Each head has a bell- to bullet-shaped involucre lined with hairy to woolly phyllaries. The head is discoid, containing no ray florets but many funnel-shaped yellow disc florets with long lobes. The florets often have white markings in the throats. The fruit is an achene with a whitish or brownish pappus of bristles.
Psathyrotes annua is a species of flowering plant in the aster family known by the common names annual psathyrotes, turtleback, or mealy rosettes. It is native to the southwestern United States and as far north as Idaho. It grows in desert and scrub habitat, often in areas with alkali soils among plants such as shadscale. It is a low, flat or mounding plant with spreading, hairy, scaly stems. It is pale green to reddish purple in color with gray-green leaves, its color dull from the coating of fibers on its surface. The irregularly rounded leaf blades are up to 1.6 centimeters long with wavy or toothed edges. The knobby inflorescence arises from the leaf axils. It is lined with hairy gray-green phyllaries with dull points that curve outward. It contains several hairy yellow to reddish disc florets. The fruit is an achene covered densely in long hairs and tipped with a large pappus of bristles.
Psilocarphus brevissimus is a species of flowering plant in the family Asteraceae known by the common names short woollyheads, woolly marbles, and woolly heads.
Psilocarphus elatior is a species of flowering plant in the family Asteraceae known by the common names tall woollyheads, meadow woollyheads and tall woolly-marbles. It is native to the Pacific Northwest in western North America from Vancouver Island, where it is known from just a few occurrences, to northern California. It grows in seasonally moist spots such as meadows, spring seeps, and vernal pools.
Psorothamnus schottii is a species of flowering plant in the legume family known by the common name Schott's dalea. It is native to the Sonoran Deserts of northern Mexico and adjacent sections of Arizona and the Colorado Desert in California.
Solanum marginatum is a species of plant in the family Solanaceae known by the common names purple African nightshade and white-margined nightshade. It is native to Ethiopia and Eritrea, and it is known on other continents as an introduced species and sometimes a weed. It is a hairy shrub growing up to two meters tall. The large, distinctive, gray-green leaves are wavy along the edges, woolly on the undersides, and measure up to 18 centimeters long. The veins are white and lined with large, widely spaced prickles. The inflorescence contains several white flowers, hanging or nodding bisexual flowers and erect staminate flowers with large yellow anthers. The fruit is a yellow berry up to 5 centimeters wide.
Sphaeralcea angustifolia is a species of flowering plant in the mallow family known by the common names copper globemallow and narrow-leaved globemallow. It is native to the southwestern United States as well as northern and central Mexico, where it grows in desert and plateau habitat. It produces many erect stems, approaching three meters in maximum height. It is woolly or felt-like in texture. The gray-green leaf blades are lance-shaped and measure up to about 5 cm long. They have wavy or slightly lobed edges. The leafy inflorescence bears several flowers each with five wedge-shaped orange petals just under 1 cm in length, and yellow anthers.
Sphaeromeria cana is a species of flowering plant in the family Asteraceae known by the common name gray chickensage. It is native to the western United States, where it is known from the Sierra Nevada, the adjacent desert ranges of eastern California and Nevada, and Steens Mountain of Oregon. It grows in dry, rocky mountain habitat, such as cracks and crevices, including the talus above the tree line. This is an aromatic subshrub with numerous erect branches growing up to 30 to 60 centimeters tall. It is gray-green in color and coated with woolly fibers. The leaves are linear or lance-shaped, the lower ones divided into lobes. The inflorescence is generally a cluster of flower heads lined with woolly phyllaries and containing yellow disc florets. There are no ray florets. The fruit is a ribbed achene about 2 millimeters long.
Tidestromia lanuginosa is a species of flowering plant in the family Amaranthaceae known by the common name woolly tidestromia.
Thymophylla tephroleuca is a rare species of flowering plant known by the common names ashy pricklyleaf and ashy dogweed. It is endemic to Texas in the United States, where it occurs in two counties near the Mexican border. It became rare due to the destruction and degradation of its habitat. It is a federally listed endangered species of the United States.
Eriogonum diatomaceum is a species of wild buckwheat known by the common name Churchill Narrows buckwheat. It is endemic to Nevada in the United States, where it is known only from the Pine Nut Mountains in Lyon County. It is limited to the Churchill Narrows near Fort Churchill State Historic Park. This plant was discovered in 1997 and described to science in 2002.
Grevillea ramosissima, commonly known as fan grevillea, is a species of flowering plant in the family Proteaceae and is endemic to eastern continental Australia. It is a low, spreading shrub with lobed leaves and clusters of cream-coloured to pale yellow flowers.
