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Trichostema lanatum flowers 2005-03-24.jpg
Trichostema lanatum
Scientific classification
Kingdom: Plantae
(unranked): Angiosperms
(unranked): Eudicots
(unranked): Asterids
Order: Lamiales
Family: Lamiaceae
Genus: Trichostema
Type species
Trichostema dichotomum
  • Isanthus Michx.
  • Eplingia L.O.Williams

Trichostema /ˌtrɪkɵˈstmə/[3] is a genus of flowering plants in the Lamiaceae family, which are aromatic herbs or subshrubs. These plants are native to North America.[2][4] Many plant of this genus which have whorls of small blue flowers are called by the common name Blue curls.

  1. Trichostema arizonicum A.Gray - Arizona, New Mexico, Texas, Sonora, Chihuahua
  2. Trichostema austromontanum H.F.Lewis - Nevada, California, Baja California
  3. Trichostema brachiatum L. - eastern, central, + southwestern US; also Quebec, Ontario
  4. Trichostema dichotomum L. - Bahamas, Quebec, Ontario, eastern + south-central US
  5. Trichostema lanatum Benth. - California, Baja California
  6. Trichostema lanceolatum Benth. - Washington, Oregon, California, Baja California
  7. Trichostema laxum A.Gray - Oregon, California
  8. Trichostema mexicanum Epling - northeastern Mexico
  9. Trichostema micranthum A.Gray - Arizona, California, Baja California
  10. Trichostema oblongum Benth. - British Columbia, Washington, Oregon, California, Nevada, Idaho
  11. Trichostema ovatum Curran - California
  12. Trichostema parishii Vasey - California, Baja California
  13. Trichostema purpusii Brandegee - central + southern Mexico
  14. Trichostema rubisepalum Elmer - central California
  15. Trichostema ruygtii H.Lewis - northern California (Lake, Napa, Solano Counties)
  16. Trichostema setaceum Houtt. - eastern + south-central US
  17. Trichostema simulatum Jeps. - Oregon, California
  18. Trichostema suffrutescens Kearney - Florida


  1. ^ lectotype designated by N. L. Britton et A. Brown, Ill. Fl. N.U.S. ed. 2. 3: 104 (1913)
  2. ^ a b c Kew World Checklist of Selected Plant Families
  3. ^ Sunset Western Garden Book, 1995:606–607
  4. ^ Biota of North America Program 2013 county distribution maps

External links[edit]