(279) 



larged involucre. Prostrate, diffusely dicho- 

 tomous; leaves opposite. . 



1. P. DRYMARIOIDES Fisch & Mey. Com- 

 mon. Spring. 



ORDER 3. PIPEEALES. Flowers sessile, in 

 dense spikes or racemes, bracteate, without 

 perigonium. Stem articulate. 



Family 1, SAURURE.E. 



Ovary central, compound of several follicu- 

 larcarpidia; stigmas several. 



1. Anemopsis Nutt. YEKBA MANSA. 



Flowers in a dense, conical spadix, with a 

 several-leaved, persistent, colored involucre; 

 each flower subtended by a colored bract. Sta- 

 mens adnate to the base of the ovary. Ovary 

 immersed into a rachis, 1-celled, with parietal 

 placentae. Fruit a capsule, dehiscent from the 

 apex. Leaves mostly radical. If. 



1. A. CALIFORNICA Hook. Bracts and in- 

 volucre white. San Pablo marshes. Summer. 



Herb and root-stock aromatic. 



Family 2. CERATOPHYLLEJE, 



Monoecious. Involucre 12-cleft; lobes linear, 

 truncate. $ flowers : anthers oo, sessile. $ 

 flowers: ovary 1-celled, 1-ovulate; style termi- 

 nal; fruit a nutlet, with persistent style and 

 involucre. If. Submersed aquatics; stem ar- 



