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12. Cicuta L- Water-Hemlock. 

 Umbels regularly compound. Cremocarp 

 laterally contracted. Ribs flattened, intervals 

 1-vittate. Mericarp terete. Aquatic. Flowers 

 white. — U- 



1. C. Californica Gray. Leaves pinnate, 

 the lower sometimes 2-pinnate at base; leaflets 

 serrate, the veinlets lunning into the teeth. 

 Presidio. . Summer. 



2. C. BoLANDERi Watson. All leaves 2-pin- 

 nate; leaflets serrate, the veinlets running into 

 the sinuses; involucral bracts linear. — Suisun. 

 Alvarado marshes. Summer. 



3. C. MACULATA L. Lower leaves 2-pinnate; 

 leaflets serrate, the veinlets running into the 

 sinuses; involucre obsolete. — Tamalpais. Sum- 

 mer. Poisonous aquatics. 



13. Berula Koch. 



Umbels regularly compound. Cremocarp 

 laterally contracted, ovate. Mericarp terete, 

 5-ribbed, lateral ribs not contiguous. Epi- 

 carp thick, corky. Ribs filiform. Intervals 

 oo-vittate. 



1. B. ANGUSTiFOLiA Koch. — U- Flowers 

 white. Baden Station. Summer. 



14. Pimpinella L- 



Umbels regularly compound. Cremocarp 

 laterally contracted, ovate. Mericarp convex, 



