''Streptanthus'' is a
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; 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):
*'' Streptanthus amplexicaulis''
*'' Streptanthus anceps''
*'' Streptanthus anomalus''
*'' Streptanthus barbatus'' – Pacific jewelflower
*'' Streptanthus barbiger'' – Bearded jewelflower
*'' Streptanthus barnebyi''
*'' Streptanthus batrachopus'' – Mt. Tamalpais jewelflower
*'' Streptanthus bernardinus'' – Laguna Mountain jewelflower
*'' Streptanthus brachiatus'' – Socrates Mine jewelflower
*'' Streptanthus bracteatus'' – Bracted twistflower
*'' Streptanthus breweri'' – Brewer's jewelflower
*'' Streptanthus californicus''
*'' Streptanthus callistus'' – Mt. Hamilton jewelflower
*'' Streptanthus campestris'' – Southern jewelflower
*'' Streptanthus carinatus'' – Lyreleaf jewelflower
*'' Streptanthus cooperi''
*'' Streptanthus cordatus'' – Heartleaf twistflower
*'' Streptanthus coulteri''
*'' Streptanthus crassicaulis''
*'' Streptanthus cutleri'' – Cutler's jewelflower
*'' Streptanthus diversifolius'' – Variableleaf jewelflower
*'' Streptanthus drepanoides'' – Sicklefruit jewelflower
*'' Streptanthus farnsworthianus'' – Farnsworth's jewelflower
*'' Streptanthus fenestratus'' – Tehipite Valley jewelflower (]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 flavescens''
*'' Streptanthus glandulosus'' – 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 ...
)
** ''Streptanthus glandulosus'' subsp. ''albidus'' – Metcalf Canyon jewelflower (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 ...
), endangered[Andy 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 ...
), endangered
**''Streptanthus glandulosus'' subsp. ''pulchellus''
**''Streptanthus glandulosus'' subsp. ''raichei''
**''Streptanthus glandulosus'' subsp. ''secundus''
**''Streptanthus glandulosus'' subsp. ''sonomensis''
*'' Streptanthus glaucus''
*'' Streptanthus gracilis'' – Alpine jewelflower
*'' Streptanthus hallii''
*'' Streptanthus hammittii'' , Hammitt's clay-cress (Riverside and San Diego counties, California)
*'' Streptanthus hesperidis''
*'' Streptanthus heterophyllus''
*'' Streptanthus hispidus'' – Mt. Diablo jewelflower (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 ...
)
*'' Streptanthus howellii'' – Howell's jewelflower
*'' Streptanthus hyacinthoides'' – Sandhill twistflower (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 inflatus''
*'' Streptanthus insignis'' – Plumed jewelflower
*'' Streptanthus juneae'' (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''
*'' Streptanthus lemmonii''
*'' Streptanthus longirostris'' – longbeak streptanthella, streptanthella (western US and northwestern Mexico)
*'' Streptanthus longisiliquus'' – Longfruit jewelflower
*'' Streptanthus maculatus'' – Clasping jewelflower, type species, (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 ...
)
*'' Streptanthus major''
*'' Streptanthus medeirosii'' ( Tehachapi Mountains, Kern County, California)[
*'' Streptanthus morrisonii'' – Morrison's jewelflower
*'' Streptanthus oblanceolatus''
*'' Streptanthus oliganthus'' – Masonic Mountain jewelflower
*'' Streptanthus petiolaris''
*'' Streptanthus pilosus''
*'' Streptanthus platycarpus''
*'' Streptanthus polygaloides'' – Milkwort jewelflower
*'' Streptanthus purpureus''
*'' Streptanthus simulans''
*'' Streptanthus squamiformis''
*'' Streptanthus tortuosus'' – Mountain jewelflower, shieldplant
*'' Streptanthus vernalis'' – Early jewelflower
*'' Streptanthus vimineus''
]
References
External links
Jepson Manual Treatment
Brassicaceae genera
Flora of Northern America
Taxa named by Thomas Nuttall
{{Brassicales-stub