Trichostema

Trichostema is a genus of flowering plants in the family Lamiaceae, which are aromatic herbs or subshrubs. These plants are native to North America.^[2][3] Most species in this genus are referred to by the common name bluecurls because of their blue to purple flowers and relatively long, curled stamens.^[4]

Trichostema
Trichostema lanatum
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Clade:	Angiosperms
Clade:	Eudicots
Clade:	Asterids
Order:	Lamiales
Family:	Lamiaceae
Subfamily:	Ajugoideae
Genus:	Trichostema L.
Type species
Trichostema dichotomum L.[1]
Synonyms[2]
Isanthus Michx. Eplingia L.O.Williams

There are 26 species recognized in the genus.^[5] These species are divided into 6 sections based on life history, morphology, chromosome number, and genetics.^[6][7] Research on Trichostema in Florida in the early 2020s concluded that there were 10 species native to the state (previously there were only three recognized).^[8][9] This determination was based on genetic, morphological, ecological, and phenological data.^[9]

Species

Species include:^[2][9]

• Trichostema arizonicum A. Gray – Arizona, New Mexico, Sonora, Chihuahua
• Trichostema austromontanum F.H. Lewis ex K.S. McClell. & Weakley – California, Baja California
• Trichostema bridgesii-orzellii K.S. McClell. - Florida
• Trichostema coeruleum L. - central, eastern, and southwestern North America
• Trichostema dichotomum L. – Quebec, Ontario, eastern and south-central United States
• Trichostema floridanum K.S. McClell. & Weakley - Florida, Bahamas
• Trichostema fruticosum K.S. McClell. - Mississippi, Alabama, Florida, Georgia
• Trichostema gracile K.S. McClell. - Florida
• Trichostema hobe K.S. McClell. - Florida (Martin County)
• Trichostema lanatum Benth. – California, Baja California
• Trichostema lanceolatum Benth. – Washington, Oregon, California, Baja California
• Trichostema latens K.S. McClell. - Florida (Franklin County)
• Trichostema laxum A. Gray – Oregon, California
• Trichostema mexicanum Epling – northeastern Mexico
• Trichostema micranthum A. Gray – Arizona, California, Baja California
• Trichostema microphyllum K.S. McClell. - Florida
• Trichostema nesophilum K.S. McClell. & Weakley – North Carolina, South Carolina^[10]
• Trichostema oblongum Benth. – British Columbia, Washington, Oregon, California, Nevada, Idaho
• Trichostema ovatum Curran – California
• Trichostema parishii Vasey – California, Baja California
• Trichostema purpusii Brandegee – central and southern Mexico
• Trichostema rubisepalum Elmer – central California
• Trichostema ruygtii F.H. Lewis – northern California (Lake, Napa, Solano Counties)
• Trichostema setaceum Houtt. – eastern and south-central United States
• Trichostema simulatum Jeps. – Oregon, California
• Trichostema suffrutescens Kearney – Florida