genus
Genus (; : genera ) is a taxonomic rank above species and below family (taxonomy), family as used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In bino ...
of plants within the family
Brassicaceae
Brassicaceae () or (the older but equally valid) Cruciferae () is a medium-sized and economically important Family (biology), family of flowering plants commonly known as the mustards, the crucifers, or the cabbage family. Most are herbaceous pla ...
. There are 58 known
species
A species () is often defined as the largest group of organisms in which any two individuals of the appropriate sexes or mating types can produce fertile offspring, typically by sexual reproduction. It is the basic unit of Taxonomy (biology), ...
within the genus ''Streptanthus'', distributed through the western and south-central United States and northern Mexico. The common names for this genus are twistflower and jewelflower. Twenty-four of the species and eleven lesser taxa occur in
California
California () is a U.S. state, state in the Western United States that lies on the West Coast of the United States, Pacific Coast. It borders Oregon to the north, Nevada and Arizona to the east, and shares Mexico–United States border, an ...
, thirty-two of which are California
endemics
Endemism is the state of a species being found only in a single defined geographic location, such as an island, state, nation, country or other defined zone; organisms that are indigenous to a place are not endemic to it if they are also foun ...
; seventeen of these California taxa are classified as rare plants.
Species and subspecies
58 species are accepted. The following are some of the species (or subspecies) of the genus ''Streptanthus'' (county locations are not intended to be exhaustive):
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Streptanthus amplexicaulis
''Streptanthus'' is a genus of plants within the family Brassicaceae. There are 58 known species within the genus ''Streptanthus'', distributed through the western and south-central United States and northern Mexico. The common names for this gen ...
''
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Streptanthus anceps
''Streptanthus anceps'', synonyms ''Caulanthus anceps'' and ''Guillenia lemmonii'', is a species of flowering plant in the family Brassicaceae, known by the common name Lemmon's mustard.
It is endemic to California, where it grows on open slopes ...
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Streptanthus anomalus
''Streptanthus anomalus'' is a species of flowering plant in family Brassicaceae known by the common names Mount Burdell jewelflower and Tcukamos jewelflower. It is endemic to Mount Burdell in Marin County, California.
Description
''Streptanthu ...
Streptanthus barnebyi
''Streptanthus'' is a genus of plants within the family Brassicaceae. There are 58 known species within the genus ''Streptanthus'', distributed through the western and south-central United States and northern Mexico. The common names for this gen ...
Streptanthus bernardinus
''Streptanthus bernardinus'' is a species of flowering plant in the mustard family known by the common name Laguna Mountains jewelflower.
Distribution
It is native to southern California and northern Baja California, where it grows in the Trans ...
'' – Laguna Mountain jewelflower
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Streptanthus brachiatus
''Streptanthus brachiatus'' is a species of flowering plant in the mustard family known by the common name Socrates Mine jewelflower. It is endemic to the Inner North Coast Ranges of California north of the San Francisco Bay Area. It can be foun ...
'' – Socrates Mine jewelflower
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Streptanthus bracteatus
''Streptanthus bracteatus'' is a species of flowering plant in the mustard family known by the common names bracted jewelflower and bracted twistflower. It is endemic to Texas in the United States.Streptanthus breweri'' – Brewer's jewelflower
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Streptanthus californicus
''Streptanthus'' is a genus of plants within the family Brassicaceae. There are 58 known species within the genus ''Streptanthus'', distributed through the western and south-central United States and northern Mexico. The common names for this gen ...
''
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Streptanthus callistus
''Streptanthus callistus'' is a rare species of flowering plant in the mustard family known by the common name Mount Hamilton jewelflower. It is endemic to Santa Clara County, California, where it is known from only about five occurrences around ...
'' – Mt. Hamilton jewelflower
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Streptanthus campestris
''Streptanthus campestris'' is a species of flowering plant in the mustard family known by the common name southern jewelflower. It is native to southern California and northern Baja California, where it is known from fewer than 20 occurrences sc ...
'' – Southern jewelflower
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Streptanthus carinatus
''Streptanthus carinatus'', the lyreleaf jewelflower, is an annual to biennial plant in the mustard family (Brassicaceae) found in the Arizona Upland of the Sonoran Desert
The Sonoran Desert () is a hot desert and ecoregion in North America ...
'' – Lyreleaf jewelflower
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Streptanthus cooperi
''Streptanthus'' is a genus of plants within the family Brassicaceae. There are 58 known species within the genus ''Streptanthus'', distributed through the western and south-central United States and northern Mexico. The common names for this gen ...
''
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Streptanthus cordatus
''Streptanthus cordatus'' is a species of flowering plant in the Brassicaceae, mustard family known by the common name heartleaf twistflower. It is native to the western United States, where it can be found in many types of sagebrush, woodland, a ...
'' – Heartleaf twistflower
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Streptanthus coulteri
''Streptanthus'' is a genus of plants within the family Brassicaceae. There are 58 known species within the genus ''Streptanthus'', distributed through the western and south-central United States and northern Mexico. The common names for this gen ...
''
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Streptanthus crassicaulis
''Streptanthus'' is a genus of plants within the family Brassicaceae. There are 58 known species within the genus ''Streptanthus'', distributed through the western and south-central United States and northern Mexico. The common names for this gen ...
''
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Streptanthus cutleri
''Streptanthus cutleri'', known as Cutler's jewelflower, is a species of annual flower only found in the Big Bend region of Texas. Its specific epithet and common name both reference Hugh Carson Cutler, who first collected the plant in 1937. A ...
'' – Cutler's jewelflower
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Streptanthus diversifolius
''Streptanthus'' is a genus of plants within the family Brassicaceae. There are 58 known species within the genus ''Streptanthus'', distributed through the western and south-central United States and northern Mexico. The common names for this gen ...
'' – Variableleaf jewelflower
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Streptanthus drepanoides
''Streptanthus drepanoides'' is an uncommon species of flowering plant in the mustard family known by the common name sicklefruit jewelflower. It is endemic to California, where it is known from a scattered distribution throughout several mountai ...
'' – Sicklefruit jewelflower
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Streptanthus farnsworthianus
''Streptanthus farnsworthianus'' is an uncommon species of flowering plant in the mustard family known by the common name Farnsworth's jewelflower. It is endemic to California, where it is limited to the woodlands of the Sierra Nevada foothills. ...
Fresno County, California
Fresno County (), officially the County of Fresno, is a county located in the central portion of the U.S. state of California. As of the 2020 United States census, the population was 1,008,654. The county seat is Fresno, the fifth-most popu ...
Streptanthus glandulosus
''Streptanthus glandulosus'' is a species of flowering plant in the mustard family known by the common name bristly jewelflower. It is native to California and southwestern Oregon, where it grows in many types of habitat, including grassland, cha ...
'' – Bristly jewelflower, common jewelflower (
Mendocino County
Mendocino County (; ''Mendocino'', Spanish language, Spanish for "of Antonio de Mendoza, Mendoza") is a County (United States), county located on the North Coast (California), North Coast of the U.S. state of California. As of the 2020 United S ...
to
San Luis Obispo County, California
San Luis Obispo County (), officially the County of San Luis Obispo, is a County (United States), county on the Central Coast of California. As of the 2020 United States census, the population was 282,424. The county seat is San Luis Obispo ...
Santa Clara County, California
Santa Clara County, officially the County of Santa Clara, is the sixth-most populous county in the U.S. state of California, with a population of 1,936,259 as of the 2020 United States census, 2020 census. Santa Clara County and neighboring Sa ...
), endangeredAndy Kratter, ''Summary of Rare Plant Search along the Western California University Access Road Alignment, Los Gatos, County of Santa Clara, California'', prepared for City of Los Gatos and State of California Environmental Clearinghouse, Earth Metrics Inc. Report 7965.W0, May, 1989
**''Streptanthus glandulosus'' subsp. ''arkii''
**''Streptanthus glandulosus'' subsp. ''glandulosus''
**''Streptanthus glandulosus'' var. ''hoffmanii''
**''Streptanthus glandulosus'' subsp. ''josephinensis''
** ''Streptanthus glandulosus'' subsp. ''niger'' – Tiburon jewelflower (
Marin County, California
Marin County ( ) is a County (United States), county located in the northwestern part of the San Francisco Bay Area of the U.S. state of California. As of the 2020 United States census, 2020 census, the population was 262,231. Its county seat a ...
Contra Costa County, California
Contra Costa County (; ''Contra Costa'', Spanish for 'Opposite Coast') is a county located in the U.S. state of California, in the East Bay of the San Francisco Bay Area. As of the 2020 United States census, the population was 1,165,927. Th ...
)
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Streptanthus howellii
''Streptanthus'' is a genus of plants within the family Brassicaceae. There are 58 known species within the genus ''Streptanthus'', distributed through the western and south-central United States and northern Mexico. The common names for this gen ...
Texas
Texas ( , ; or ) is the most populous U.S. state, state in the South Central United States, South Central region of the United States. It borders Louisiana to the east, Arkansas to the northeast, Oklahoma to the north, New Mexico to the we ...
,
Arkansas
Arkansas ( ) is a landlocked state in the West South Central region of the Southern United States. It borders Missouri to the north, Tennessee and Mississippi to the east, Louisiana to the south, Texas to the southwest, and Oklahoma ...
,
Louisiana
Louisiana ( ; ; ) is a state in the Deep South and South Central regions of the United States. It borders Texas to the west, Arkansas to the north, and Mississippi to the east. Of the 50 U.S. states, it ranks 31st in area and 25 ...
,
Oklahoma
Oklahoma ( ; Choctaw language, Choctaw: , ) is a landlocked U.S. state, state in the South Central United States, South Central region of the United States. It borders Texas to the south and west, Kansas to the north, Missouri to the northea ...
,
Nebraska
Nebraska ( ) is a landlocked U.S. state, state in the Midwestern United States, Midwestern region of the United States. It borders South Dakota to the north; Iowa to the east and Missouri to the southeast, both across the Missouri River; Ka ...
Streptanthus juneae
''Streptanthus'' is a genus of plants within the family Brassicaceae. There are 58 known species within the genus ''Streptanthus'', distributed through the western and south-central United States and northern Mexico. The common names for this gen ...
'' (
San Bernardino Mountains
The San Bernardino Mountains are a high and rugged mountain range in Southern California in the United States. Situated north and northeast of San Bernardino and spanning two California counties, the range tops out at at San Gorgonio Mountain ...
, San Bernardino County, California)Nick Jensen "Two New Species of Streptanthus (Brassicaceae) in Southern California, and Notes on their Conservation," ''Madroño'', 67(1), 19-34, (23 April 2020) https://doi.org/10.3120/0024-9637-67.1.19
*'' Streptanthus lasiophyllus''
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Streptanthus lemmonii
''Streptanthus'' is a genus of plants within the family Brassicaceae. There are 58 known species within the genus ''Streptanthus'', distributed through the western and south-central United States and northern Mexico. The common names for this gen ...
Arkansas
Arkansas ( ) is a landlocked state in the West South Central region of the Southern United States. It borders Missouri to the north, Tennessee and Mississippi to the east, Louisiana to the south, Texas to the southwest, and Oklahoma ...
,
Oklahoma
Oklahoma ( ; Choctaw language, Choctaw: , ) is a landlocked U.S. state, state in the South Central United States, South Central region of the United States. It borders Texas to the south and west, Kansas to the north, Missouri to the northea ...
,
Texas
Texas ( , ; or ) is the most populous U.S. state, state in the South Central United States, South Central region of the United States. It borders Louisiana to the east, Arkansas to the northeast, Oklahoma to the north, New Mexico to the we ...
Tehachapi Mountains
The Tehachapi Mountains (; Kawaiisu: ''Tihachipia'', meaning "hard climb") are a mountain range in the Transverse Ranges system of California in the Western United States. The range extends for approximately in southern Kern County and northwe ...
Streptanthus vimineus
''Streptanthus'' is a genus of plants within the family Brassicaceae. There are 58 known species within the genus ''Streptanthus'', distributed through the western and south-central United States and northern Mexico. The common names for this gen ...