| Lasthenia burkei | |
|---|---|
 | |
Scientific classification  | |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Clade: | Asterids |
| Order: | Asterales |
| Family: | Asteraceae |
| Genus: | Lasthenia |
| Species: | L. burkei |
| Binomial name | |
| Lasthenia burkei | |
Lasthenia burkei is a rare species of flowering plant in the family Asteraceae known by the common names Burke's goldfields and Burke's baeria.
The plant is endemic to California, where it is known from three counties north of the San Francisco Bay Area. It grows in moist spring meadows and vernal pools.
This is a listed endangered species on the federal level in the United States and the state level in California. It is listed as Critically Imperiled—Critically endangered by NatureServe.
There are probably fewer than ten occurrences in Lake, Mendocino, and Sonoma Counties. [1] It is threatened by the destruction and degradation of its rare wetland habitat, and it may be extinct by 2025. [1]
Lasthenia burkei is an erect annual herb producing hairy stems with sparse linear or deeply divided, narrow, pointed leaves a few centimeters long.
Atop the stem is an inflorescence, which is a flower head with a base of hairy phyllaries. The head contains many yellow disc florets surrounded by a fringe of several short ray florets, which are usually also yellow.
The fruit is a hairy, club-shaped achene less than 2 millimeters long.
Limnanthes vinculans, the Sebastopol meadowfoam, is an endangered species of meadowfoam found only in the Laguna de Santa Rosa in Sonoma County, California, United States and an area slightly to the south in the Americano Creek and Washoe Creek watersheds. The name vinculans derives from the Latin root vinculum, meaning "a bond, a cord." The specific epithet vinculans means linking or bonding, in reference to the sharing of some characters of L. vinculans with L. douglasii (R.Br) and L. bakeri.
Lasthenia, commonly known as goldfields, is a genus of flowering plants family Asteraceae. The genus is named after Lasthenia of Mantinea, a cross-dressing female pupil of the ancient Greek philosopher Plato.
Lasthenia conjugens, commonly known as Contra Costa goldfields, is an endangered species of wildflower endemic to a limited range within the San Francisco Bay Area of the state of California, USA. Specifically this rare species occurs in Napa, Santa Barbara, Solano, Contra Costa, Santa Clara, Monterey and Alameda Counties. This annual herb typically flowers from March through June, and its colonies grow in vernal pool habitats at elevations not exceeding 100 meters above sea level. The Jepson Manual notes that the present distribution is limited to the deltaic Sacramento Valley, principally Napa and Solano Counties, but the historic range of L. conjugens is known to be significantly wider. In any case, historically the range has included parts of the North Coast, Sacramento Valley, and San Francisco Bay Area as well as the South Coast. Alternatively and less frequently this taxon has been referred to as Baeria fremontii var. conjugens.
Lasthenia californica is a species of flowering plant in the family Asteraceae known by the common name California goldfields. It is native to western North America.
Lasthenia chrysantha is a species of flowering plant in the family Asteraceae known by the common name alkalisink goldfields. It is endemic to the California Central Valley, where it grows in vernal pools and alkali flats.
Lasthenia coronaria is a species of flowering plant in the family Asteraceae known by the common name royal goldfields. It is native to California and Baja California, including Guadalupe Island.
Lasthenia ferrisiae is a species of flowering plant in the family Asteraceae known by the common name Ferris' goldfields. It is endemic to the California Central Valley, where it grows in vernal pools and alkali flats.
Lasthenia fremontii is a species of flowering plant in the family Asteraceae known by the common name Frémont's goldfields. It is endemic to the California Central Valley, where it grows in vernal pools and meadows.
Lasthenia glaberrima is a species of flowering plant in the family Asteraceae known by the common names smooth goldfields and rayless goldfields. It is native to western North America from British Columbia to California, where it grows in wet meadows and vernal pools.
Lasthenia glabrata is a North American species of flowering plant in the family Asteraceae known by the common names yellowray goldfields and yellow-rayed lasthenia. It is endemic to California, where it is a resident of vernal pools and other moist areas in a number of habitat types. It is widespread across much of the state, from San Diego County to Tehama County.
Lasthenia microglossa is a species of flowering plant in the family Asteraceae known by the common name smallray goldfields. It is endemic to California, where it grows in shady areas in a number of habitats.
Blennosperma bakeri is a rare species of flowering plant in the daisy family known by the common names Baker's stickyseed and Sonoma sunshine.
Lasthenia platycarpha is a species of flowering plant in the family Asteraceae known by the common name alkali goldfields. It is endemic to California, where it is known mainly from the Central Valley.
Perityle inyoensis, known by the common names Inyo rockdaisy and Inyo laphamia, is a rare species of flowering plant in the aster family.
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.
Agnorhiza reticulata, known by the common name El Dorado County mule's ears, is a rare species of flowering plant found only in a small region of north-central California.
Deinandra bacigalupii is a rare species of flowering plant in the family Asteraceae, known by the common names Livermore tarplant and Livermore moonshine. It is endemic to Alameda County, California, where there are only about five known occurrences around Livermore. It grows in open areas with alkali soils, such as alkali sinks and meadows. This plant was previously included within Deinandra increscens ssp. increscens, but it was separated and elevated to species level in 1999.
Heterotheca monarchensis is a rare species of flowering plant in the family Asteraceae known by the common names monarch goldenaster and sequoia false goldenaster. It is endemic to Fresno County, California, where it is known from only one location near Boyden Cave in the Kings River Canyon. It grows in the limestone cliffs of this Sierra Nevada river canyon, along with a few other rare local endemics. The plant was discovered in July, 1995, and described to science as a new species in 1996.
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.
Media related to Lasthenia burkei at Wikimedia Commons