Euphorbia crenulata  Engelm.

Ubiquity:  Uncommon

Distritution:  Throughout except Napa Marsh

Plant Communities:  Many

Habitats:  Dry, sunny(?), rocky

Elevations:  300-1500'

Comments:  Non-native

Updated:  2/3/98

Euphorbia lathyris  L.

Ubiquity:  Very uncommon

Distritution:  Reported only for Napa River at Yountville Cross Rd., Redwood Rd., Wildhorse Valley

Plant Communities:  Riparian Woodland, Ruderal

Habitats:  Dry, sunny, clayey, weedy riverbeds/waste areas/roadsides/ & cultivated areas; in alluvial & volcanic places

Elevations:  83-150'

Comments:  Non-native

Updated:  2/3/98

Euphorbia oblongata  Griseb.

Ubiquity:  Very uncommon

Distritution:  Known to grow only along the Napa River at the Yountville Ecological Preserve

Plant Communities:  Valley Oak Woodland, (Ruderal?)

Habitats:  A moist, shaded, wooded streambank; in an alluvial place

Elevations:  75-95'

Comments:  Non-native.  Collection needed

Updated:  2/18/98

Euphorbia peplus  L.

Ubiquity:  Uncommon

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

Plant Communities:  Regular Chaparral, Riparian Woodland, Ruderal

Habitats:  Dry, sunny, rocky, ultramafic or not, brushy or wooded slopes/flats/summits; in disturbed areas; in volcanic, alluvial, & serpentine places

Elevations:  300-1800'

Comments:  Non-native

Updated:  2/3/98

Euphorbia spathulata  Lam.

Ubiquity:  Uncommon

Distritution:  N1/2

Plant Communities:  Many, including Ruderal

Habitats:  Dry, sunny, rocky, ultramafic or not, weedy slopes/flats; in disturbed areas; in alluvial or volcanic or serpentine areas

Elevations:  

Comments:  

Updated:  2/3/98