Monolopia congdonii is a rare species of flowering plant in the family Asteraceae known by the common name San Joaquin woollythread. It is endemic to California, where it is known only from the southern San Joaquin Valley and one area in nearby Santa Barbara County. It is a federally listed endangered species.
Acourtia microcephala is a species of flowering plant in the family Asteraceae known by the common name sacapellote. It is native to southern California and Baja California, where it grows in woodland and chaparral, especially in the coastal mountain ranges.
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.
Arnica spathulata is a rare North American species of flowering plant in the family Asteraceae, known by the common name Klamath arnica. It is native to the Klamath Mountains of northwestern California and southwestern Oregon. It grows in woodland habitat, almost exclusively on serpentine soils.
Hieracium argutum is a species of flowering plant in the family Asteraceae known by the common name southern hawkweed.
Corethrogyne filaginifolia is a species of flowering plant in the daisy family known by the common names common sandaster and California aster.
Anisocarpus madioides is a North American species of flowering plant in the family Asteraceae known by the common name woodland madia.
Malacothrix sonchoides is a species of flowering plant in the aster family known by the common names sowthistle desertdandelion and yellow saucers. It is native to much of the western United States, where it grows in sandy substrates in habitat such as Joshua tree woodland, grassland, creosote bush scrub, and ephedra-blackbrush communities.
Monolopia lanceolata, the hillside daisy or common monolopia, is a species of flowering plant in the family Asteraceae. It is endemic to the southern half of California, where it grows in many types of habitat, including coastal and valley grassland, chaparral, woodland, and desert.
Monolopia major is a species of flowering plant in the family Asteraceae known by the common name cupped monolopia.
Monolopia stricta is a species of flowering plant in the family Asteraceae known by the common name Crum's monolopia. It is endemic to central California, where it grows in the Central Valley and its flanking mountain ranges and foothills. It open grasslands and chaparral, often in clay soils. It is an annual herb producing a slender, sometimes branching stem up to about 80 centimeters tall. It is usually somewhat woolly in texture. The inflorescences at the ends of stem branches bear small hemispheric flower heads. The golden ray florets are usually about 1 to 2 centimeters long, but specimens from the western San Joaquin Valley have smaller florets.
Pyrrocoma carthamoides is a species of flowering plant in the family Asteraceae known by the common name largeflower goldenweed. It is native to western North America from British Columbia to northeastern California to Wyoming, where it is known from grassland, woodlands, forests, barren areas, and other habitat. It is a perennial herb growing from a taproot and producing one or more stems to about half a meter in maximum length, the stems reddish-green and leafy. The largest leaves are at the base of the stem, measuring up to 20 centimeters long, lance-shaped with spiny sawtoothed edges. Leaves higher on the stem are smaller and hairier. The inflorescence is a single flower head or a cluster of up to four. Each bell-shaped head is lined with phyllaries each up to 2 centimeters long. It has many yellow disc florets surrounded by a fringe of yellow ray florets up to 7 millimeters long; ray florets are occasionally absent. The fruit is an achene which may be well over a centimeter in length including its pappus.
Sanvitalia abertii is a species of flowering plant in the family Asteraceae known by the common names Abert's creeping zinnia and Abert's sanvitalia. It is native to the southwestern United States and northern Mexico, where it grows in desert scrub, desert mountains and woodlands. It is an annual herb somewhat variable in appearance. The mainly erect stem may be 2 to 29 centimeters tall, and simple or with many branches. The linear or lance-shaped leaves are a few centimeters long. The plant is coated in rough hairs. The inflorescence is a cyme of flower heads with thick, leathery yellow ray florets 2 or 3 millimeters long and notched at the tips. The fruit is an achene. Achenes arising from the ray florets are light-colored and tipped with pappi, while those from the disc florets at the center of the flower head are darker and lack pappi.
Senecio aronicoides is a species of flowering plant in the aster family known by the common name rayless ragwort. It is native to Oregon and northern and central California, where it can be found in the woodlands and forests of mountains and foothills, often in relatively dry habitat. It is a biennial or perennial herb growing up to about 90 centimeters tall from a fleshy root attached to a buttonlike caudex. The plant is often slightly woolly or cobwebby in texture. The leaves have lance-shaped to oval blades measuring up to 20 centimeters long, the largest ones lower on the stem. The inflorescence is a corymb which is flat and spreading, often resembling an umbel. The flower heads are cups lined with black- or green-tipped phyllaries and filled with many gold disc florets. There are usually no ray florets but one or two occasionally emerge from a head. The fruit is a hairless achene tipped with a pappus of long, white bristles.
Senecio californicus is a species of flowering plant in the aster family known by the common name California ragwort.
Packera ganderi is a rare species of flowering plant in the aster family known by the common name Gander's ragwort. It is endemic to southern California, where it is known from a few occurrences in San Diego and Riverside Counties.
Packera layneae, known by the common name Layne's ragwort and Layne's butterweed, is a rare species of flowering plant in the aster family.
Packera pseudaurea is a species of flowering plant in the aster family known by the common name falsegold groundsel. It is native to North America, where it can be found in western and central parts of Canada and the United States. It grows in mountain habitat such as meadows, streambanks, and woodlands.
Senecio serra is a species of flowering plant in the aster family known by the common names tall ragwort and sawtooth groundsel. It is native to the western United States, where it can be found in several types of habitat, including sagebrush and woodlands. It is a perennial herb producing a single erect stem or a cluster of stems from a branched, woody caudex. The plant can exceed two meters in height. It is hairless in texture, with young plants sometimes appearing fuzzy, and green to red-tinged in color. The leaves have lance-shaped blades up to 20 centimeters long borne on short petioles, the leaves occurring evenly all along the stems. The inflorescence is a spreading array of many flower heads, each lined with green- or black-tipped phyllaries. The heads contain yellow disc florets and 5 to 8 yellow ray florets each under a centimeter long.
Arnica dealbata is a species of Californian plants in the tarweed tribe within the aster family
