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1. Qi. Cauirornica Watson.—Common. 
Aquatic. Summer. 
The European congeners of this plant, @. jis- 
tulosa and (. crocata, are undoubtedly pois- 
onous. Our species is eagerly eaten by cattle, 
a fact that becomes very evident in a swamp 
near the Presidio, where it grows in company 
with Cicuta Californica, the latter not being 
touched by the animals when Gnanthe is eaten 
up to the roots. It would be desirable to in- 
vestigate the properties of the species. 
10, Osmorrhiza Raf. Sweet CICELY. 
Umbels regularly compound. Cremocarp 
terete, elongate, angulate, sulcate, hispid. 
Vitte 0. Flowers white. —2¢. 
1. O. BRacHypopa Torr. Involucral bracts 
linear and acuminate, equaling the flowers. 
Saucelito. Summer. 
2. O. nuda Torr. Involucre and involucels 
small and caducous.—Common. Summer. 
11, Sium L. WATER-PARSNIP. 
Umbels regularly compound. Cremocarp 
laterally compressed, oblong. Mericarp dor- 
sally convex, plain on the face, 5-ribbed. 
Ribs filiform. Intervals more than 1-vittate. 
Flowers white.—2f. 
1. S. clour#rotium Gmelin. —Aquatic. 
Baden Station. Summer. Probably poison- 
ous. 
