CYPERACEJ1. 473 



5. Cyperus erythrorhizos, MM. 



Cyperus erythrorhizos, Muhl. Gram. p. 20 ; Schult. Mant. 2, p. 220 ; Torr. Cyp. 1. c. 



p. 280 ; Steud. Cyp. p. 40 ; Gray Man. ed. 2, p. 492. 

 G. tenuifiorus, Ell. Sk. 1, p. 70, non Kottb. 

 C. occidentalis, Torr. Cyp. p. 259 ; Hook. Fl. Bor.-Am. 2, p. 232 (forma depau- 



perata). 



Hab. Valley of the Upper Sacramento, California. — Plant varying 

 from 2 or 3 inches to more than 4 feet high. Spikelets 12 to 40 

 flowered. 



Besides the Cyperi here enumerated, there are, in the collection, 

 specimens of another species which I cannot refer to any one hitherto 

 found in North America. It somewhat resembles G. Baldwinii,. but 

 .the rays of the umbel are shorter, the heads larger and somewhat 

 compound, and the spikelets only 4-flowered. The fruit is not suffi- 

 ciently mature to determine its. characters. 



3. HEMICARPHA, Nees. 

 1. Hemicarpha subsquarrosa, Nees. 



Hemiearpha subsquarrosa, Nees Cyp. in Endl. & Mart. Fl. Bras. p. 61, t. 4, f. 1 ; 



Torr. Fl. N. York, 2, p. 362 ; Gray Man. ed. 2, p. 495. 

 Scirpus subsquarrosus, Muhl. Gram. p. 39. 

 Isolepis subsquarrosa, Schrad. in Schult. Mant. 2, p. 64 ; Torr. Cyp. 1. c. p. 348. 



Hab. Banks of the Sacramento, California. — Apparently rare on 

 western side of the continent, but common on the eastern. 



119 



