Grindelia stricta is a species of flowering plant in the family Asteraceae known by the common names Oregon gumplant, Oregon gumweed and coastal gumplant. It is native to the west coast of North America from California to Alaska, where it is a resident of coastal plant communities such as those in marshes and beaches. This plant is variable in appearance, taking the form of a weedlike perennial herb forming low clumps to a sprawling subshrub growing erect to heights exceeding one meter. Its foliage and stems are green to rusty red or purplish and the plant may be hairy to hairless. The fleshy leaves are green, often with red edges and veining, and are up to 15 centimeters in length on large plants. The inflorescence holds one or more flower heads each up to 5 centimeters wide. The flower head is a cup of thick erect or recurved green phyllaries. Yellow disc florets fill the center of the flower head and there is a fringe of yellow ray florets around the circumference. The head produces copious amounts of white latex, especially in the early stages of blooming.
Helianthus niveus is a species of sunflower known by the common names showy sunflower and snowy sunflower. It is native to northern Mexico and the Southwestern United States.
Hemizonia congesta, known by the common name hayfield tarweed, is a species of flowering plant in the family Asteraceae, native to western North America.
Layia chrysanthemoides is a species of flowering plant in the family Asteraceae known by the common name smooth tidytips, or smooth layia.
Layia glandulosa is a species of flowering plant in the family Asteraceae known by the common names whitedaisy tidytips and white layia. It is native to western North America south from central Washington (state) to Baja California and east to Utah and Arizona, where it is common in a number of habitat types.
Layia heterotricha is a species of flowering plant in the family Asteraceae known by the common name pale yellow tidytips, or pale yellow layia.
Layia jonesii is a species of flowering plant in the family Asteraceae known by the common name Jones' tidytips, or Jones' layia.
Layia pentachaeta is a species of flowering plant in the family Asteraceae known by the common name Sierra tidytips, or Sierra layia.
Leontodon saxatilis is a species of hawkbit known by the common names lesser hawkbit, rough hawkbit, and hairy hawkbit. It is native to Europe and North Africa but can be found in many other places across the globe as an introduced species and often a noxious weed. This is a dandelion-like herb growing patches of many erect, leafless stems from a basal rosette of leaves. The leaves are 2 to 15 centimeters long, 0.5 to 2.5 centimeters wide, entire or lobed, and green in color. Atop the stems are solitary flower heads which are ligulate, containing layered rings of ray florets with no disc florets. The florets are yellow with toothed tips. The fruit is a cylindrical achene with a pappus of scales. Fruits near the center of the flower head are rough, while those growing along the edges of the head are smooth.
Symphyotrichum greatae is a species of flowering plant in the family Asteraceae endemic to California and known by the common name Greata's aster.
Calycadenia mollis is a species of flowering plant in the family Asteraceae known by the common name soft western rosinweed. It is native to a section of central California, from Tuolumne County do northern Tulare County. There are also isolated populations farther north in Nevada County. The plant grows in a number of habitat types in the Central Valley and adjacent Sierra Nevada foothills.
Calycadenia pauciflora is a species of flowering plant in the family Asteraceae known by the common name smallflower western rosinweed. It is endemic to northern California, where it grows in the Coast Ranges north of the San Francisco Bay Area from Napa County to Tehama County, often on serpentine soils.
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.
Lessingia tenuis is a species of flowering plant in the family Asteraceae known by the common name spring lessingia. It is endemic to California, where it is known from the San Francisco Bay Area to Ventura County. It grows on the slopes of the California Coast Ranges in common local habitat such as chaparral.
Osmadenia is a genus of flowering plants in the family Asteraceae. It contains the single species Osmadenia tenella, which is known by the common name false rosinweed.
Pyrrocoma apargioides is a species of flowering plant in the family Asteraceae known by the common name alpineflames. It is native to the western United States from the Sierra Nevada of California east to Utah, where it grows in the forests and meadows of high mountains. It is a perennial herb growing from a taproot and producing one or more stems to 30 centimeters in length. The stems are decumbent or upright, reddish, and hairless to slightly woolly. Most of the leaves are located around the base. They are thick and leathery, lance-shaped with large sawteeth along the edges, often center-striped in white, and measure up to 10 centimeters long. The inflorescence is usually a single flower head lined with centimeter-long phyllaries which are reddish to green with red edges. The head has a center of yellow disc florets and a fringe of ray florets which are yellow, often splashed with red along the undersides, measuring up to 1.6 centimeters in length. The fruit is an achene which may be well over a centimeter in length including its pappus.
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 integerrimus is a species of flowering plant in the aster family known by the common names lambstongue ragwort and tall western groundsel. It is native to western and central North America, where it grows in grassland, forest, and other habitat. It is a biennial or perennial herb producing one or a few erect stems 20 to 70 centimeters tall from a caudex with fleshy shallow roots. The linear to lance-shaped or triangular leaves are primarily basal, with blades up to 25 cm (10 in) long. The herbage is slightly hairy to woolly or cobwebby. The inflorescence bears several flower heads in a cluster, the middle, terminal head often largest and held on a shorter peduncle, making the cluster look flat. The heads contain many disc florets and usually 8 or 13 ray florets which may be yellow to cream to white in color. Some heads lack ray florets.
Deinandra conjugens is a rare species of flowering plant in the family Asteraceae known by the common names Otay tarplant and Otay tarweed. It is native to a small section of far northern Baja California in Mexico, its range extending north into San Diego County, California, in the United States. One isolated population has been reported from the hills east of Cayucos in San Luis Obispo County.
Erigeron filifolius is a North American species of flowering plants in the family Asteraceae known by the common names thread-leaf fleabane.
