Layia chrysanthemoides  (DC.) A. Gray

Ubiquity:  Uncommon

Distritution:  NE 1/3 & SW 1/3 except Napa Marsh

Plant Communities:  Blue Oak Woodland, Chaparral, Annual Grassland

Habitats:  Moist, sunny, clayey, (ultramafic or not?), grassy slopes/valley floors/pastures/ & meadows; in most geologic formations (including serpentine?)

Elevations:  60-1000'

Comments:  

Updated:  3/31/98

Layia gaillardioides  (H. & A.) DC.

Ubiquity:  Very uncommon

Distritution:  Known only from American Canyon, Oat Hill Mine Rd., & Knoxville area

Plant Communities:  Serpentine Grassland, Coastal Prairie

Habitats:  Dry, sunny, rocky, ultramafic, grassy slopes/ & pastures; in serpentine formations

Elevations:  300-1500'

Comments:  Collection needed

Updated:  3/31/98

Layia platyglossa  (F. & M.) A. Gray

Ubiquity:  Uncommon

Distritution:  Anywhere cultivated

Plant Communities:  Ruderal

Habitats:  Dry, sunny, roadsides, cultivated places like gardens & landscapes; in alluvial formations

Elevations:  500-750'

Comments:  Non-native to Napa Co.  Common component of wildflower seed mixes; not very persistent.  Collection needed

Updated:  3/31/98

Layia septentrionalis  Keck

Ubiquity:  Uncommon

Distritution:  NE 1/2

Plant Communities:  Serpentine Grassland 

Habitats:  Dry, sunny, rocky, ultramafic, grassy hillsides/pastures/ & valley floors; in serpentine formations

Elevations:  85-2340'

Comments:  Rare & Endangered (CNPS-1B).  Not to be collected

Updated:  3/31/98