Centaurium davyi  (Jeps.) Abrams

Ubiquity:  Uncommon

Distritution:  Napa Range from Mt. George to Atlas Peak, & in Pope Valley

Plant Communities:  Regular & Serpentine Chaparrals & Serpentine Grasslands

Habitats:  Moist, sunny, rocky, ultramafic or not, brushy or grassy riparian places like seeps/springs; in volcanic & serpentine areas

Elevations:  600-1550'

Comments:  Collection needed

Updated:  2/18/98

Centaurium floribundum  (Benth.) Rob.

Ubiquity:  Very uncommon

Distritution:  Reported only from the geyser field on Tubbs Lane (north of Calistoga), Bothe State Park, Napa River at Yountville Cross Rd., & Devil's Canyon

Plant Communities:  Riparian, Hot Springs

Habitats:  Moist, sunny, clayey, acetic or not, geyser field/valley floor/riverbed

Elevations:  80-400'

Comments:  Confirmation needed.  = C. muehlenbergii in new Jeps.  ? = C. tenniflorum (H. & L.) Fritch.?

Updated:  2/10/98

Centaurium muehlenbergii  (Griseb.) W. Wight

Ubiquity:  Very uncommon

Distritution:  Reported only at Butts Canyon, Pope Canyon Rd., Weeks Lakes, Dollarhide Rd., & Rocktram (Napa Quad.)

Plant Communities:  Serpentine & Annual Grasslands

Habitats:  Moist, sunny, rocky or clayey, ultramafic or not, grassy flats/meadows; on serpentine formations

Elevations:  10-800'

Comments:  = C. floribundum in new Jeps.

Updated:  2/10/98

Centaurium trichanthum  (Griseb.) Rob.

Ubiquity:  Common

Distritution:  N1/2 & SW1/4 except Napa Marsh

Plant Communities:  Serpentine Chaparral, Coastal Prairie, Riparian, Hot Springs

Habitats:  Moist, sunny, rocky or clayey, ultramafic or saline, grassy or brushy pond or lake sides/seasonal drainages/ditches/creeksides; on serpentine & volcanic formations

Elevations:  5-2200'

Comments:  

Updated:  2/10/98