| Western rosinweeds | |
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| Calycadenia multiglandulosa | |
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| Genus: | Calycadenia |
Calycadenia is a genus of flowering plants in the aster family, Asteraceae, [1] [2] known commonly as the western rosinweeds. [3] They are native to California, especially around the Central Valley. [4] The ranges of two species (C. fremontii + C. truncata) do extend north into Oregon. [5] [6]
These are annual herbs variable in size from just a few centimeters tall to well over one meter. They are aromatic. The leaves are alternately arranged except in C. oppositifolia , in which they are opposite. The leaves are narrow and linear in shape, resembling grass leaves. They sometimes have slightly toothed edges. Flower heads are solitary or borne in open arrays or clusters in the leaf axils. The peduncles that hold the flower heads have bracts with one or more tack-shaped glands. The head usually has one or more phyllaries stuck to the ray florets; these often have similar tack-shaped glands. There are one to six ray florets on the head, each with 3 lobes at the tip. They are white, cream, pink, or yellow, and some have a dark red spot near the base. There are up to 25 disc florets in shades of white, cream, pink, or yellow, with anthers that are usually purple or black, sometimes yellow or brown. The fruit is an angular cypsela. Fruits from the disc flowers usually have pappi made up of several scales. [4] [5] [7]
The gland-dotted bracts on the peduncles are a distinguishing character of the genus. [4] The name Calycadenia comes from the Greek calyx ("cup") and aden ("gland"), and references the tack-shaped glands on these bracts and the phyllaries. [7]
Most of the species are self-incompatible. [7] The biology of the genus is variable; several species have races that differ in chromosome count but not much in morphology, while several others have races that are different in morphology but all have the same chromosome count. [7]
Scabiosa is a genus in the honeysuckle family (Caprifoliaceae) of flowering plants. Many of the species in this genus have common names that include the word scabious, but some plants commonly known as scabious are currently classified in related genera such as Knautia and Succisa; at least some of these were formerly placed in Scabiosa. Another common name for members of this genus is pincushion flowers.
Ionactis, common name stiff-leaved Asters or ankle-asters, is a small genus of plants belonging to the daisy family. These aster-like plants are endemic to North America. One species is widespread across much of the eastern half of the continent, while two others are rare endemics with very restricted ranges.
Euthamia is a genus of flowering plants in the aster family, Asteraceae. They are known as goldentops and grass-leaved goldenrods.
Berlandiera is a genus of flowering plants in the aster family, Asteraceae.
Calycadenia fremontii is a species of flowering plant in the daisy family known by the common name Frémont's western rosinweed. It is native to southwestern Oregon and northern California. It is a common member of the flora in several types of habitat in the mountains, foothills, and valleys. This annual plant is variable in appearance.
Calycadenia hooveri is a California species of flowering plant in the daisy family known by the common name Hoover's western rosinweed. It is endemic to a short portion of the western Sierra Nevada foothills, where it grows in rocky areas in the hills along from Amador County to Madera County.
Calycadenia mollis is a species of flowering plant in the daisy family 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 multiglandulosa is a species of flowering plant in the sunflower family, known by the common names sticky calycadenia and sticky western rosinweed. It is endemic to California, where it is a common in the Coast Ranges and in the Sierra Nevada Foothills from Shasta County to Kern County.
Calycadenia oppositifolia is a species of flowering plant in the daisy family known by the common name Butte County western rosinweed. It is native primarily to Butte County, California, although a few populations have been found in other parts of the state. It grows in the foothills of the high mountain ranges.
Calycadenia pauciflora is a species of flowering plant in the daisy family 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.
Calycadenia spicata is a species of flowering plant in the daisy family known by the common name spiked western rosinweed. It is endemic to central California, where is a common grassland plant in the Central Valley and adjacent Sierra Nevada foothills from Butte County to Kern County.
Calycadenia truncata is a species of flowering plant in the daisy family known by the common name Oregon western rosinweed. It is native to southwestern Oregon and northern and central California. It is found in the Cascades, the Coast Ranges, and the foothills of the Sierra Nevada as far south as Monterey and Tulare Counties.
Madia exigua is a species of flowering plant in the aster family known by the common names small tarweed and threadstem madia.
Anisocarpus madioides is a North American species of flowering plant in the aster family known by the common name woodland madia.
Osmadenia is a genus of flowering plants in the daisy family. It contains the single species Osmadenia tenella, which is known by the common name false rosinweed.
Symphyotrichum dumosum is a species of flowering plant of the aster family (Asteraceae) commonly known as rice button aster and bushy aster. It is native to much of eastern and central North America, as well as Haiti and Dominican Republic. It is a perennial, herbaceous plant that may reach a height of 1 meter.
Balduina uniflora is a North American species of plants in the sunflower family. It is native to the southeastern United States. It is the type species of Genus Balduina.
Felicia josephinae is a roughly hairy annual herbaceous plant of 15–20 cm (6–8 in) high, that is assigned to the daisy family. It branches near its base, and has few leaves along its stems. The lower leaves are set oppositely, inverted lance-shaped, relatively large at 3–7 cm long and ⅔–1¼ cm wide, and soon withering, while the higher ones are smaller and relatively narrower. In the axils of the leaves grow flower heads of 7–8 mm wide on stalks of up to 5 cm (2 in) long, topped with an involucre of about 5 mm (0.2 in) high and 4 mm (0.16 in) wide, consisting of eleven to thirteen bracts in two rows with bristles near the tip, eight to nine white or cream-coloured ligulate florets surrounding fourteen or fifteen deep purple disc florets. Flowers can be found in September and October. The species is an endemic species that can only be found in a small area along the west coast of the Western Cape province of South Africa.
Felicia tenella is an annual, sometimes biennial, herbaceous plant that may be slightly woody at its base, of 5–70 cm tall, that is assigned to the daisy family. The species is very variable in size and hairiness. Its branches may be erect or ascending, and the leaves are narrowly line-shaped, 2–5 cm long and about 1 mm (0.04 in) wide. The leaves have a callous tip, lack visible nerves, and are mostly rigidly ciliate. The flower heads sit individually at the tip of stalks, have an involucre of three whorls of bracts, and about thirty light blue ray florets surrounding many yellow disc florets. Four subspecies are recognised. The species naturally occurs in the Northern Cape and Western Cape provinces of South Africa.
Symphyotrichum potosinum is a species of flowering plant in the aster family (Asteraceae) native to Mexico and the U.S. state of Arizona. Commonly known as Santa Rita Mountain aster, it is a perennial, herbaceous plant that may reach 15 to 45 centimeters tall.
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