SUPPLEMENT 



ADDITIONS AND CORRECTIONS 



SPARGANIACEAE. 



Grcenei Morong. Page 9, substitute for 

 8. eitrycarpH-ni. Nutlets broadly cuneate, not sharply angled, 

 rounded at 'apex into a short beak. 



GRAMINEAE. 



AKDBOPOGONEAE. Page 19, line 8, misspelled in the text. 



Paiiicuiu pacificiim Hitchcock & Chase. Page 24, sub- 

 stitute for P. scopari-Hiii. Our Pacific Coast plant has recently 

 been segregated as a distinct species, its distinguishing 

 characters being pilose pubescence and narrow (5-8 mm.) 

 leaves. 



PTILEUM. Page 28, line 26, misspelled in the text. 



CYPERACEAE. 



Cyperus melanostacliyus HBK. Page 65, substitute for 

 C. diandrus capitatitx. 



Cyperus l>ronioides (Clarke) Britton. Insert after the 

 preceding. Stems slender, 4-8 dm. high, exceeding the 

 leaves; spikelets 4-12, lanceolate, flattened, 10-20-flowered; 

 involucral leaves 2-4 ; scales acute, 4 mm. long, yellowish 

 brown, green on the 3-nerved keel, scarious-margined; sta- 

 mens 3; styles 2-cleft; achenes ovoid, black, 1-1.5 mm. long. 

 Cienega, near Los Angeles, according to Parish. 



Cyperus speciosus Vahl. Page 67, insert at the end of 

 the genus. Annual, with stems 1-5 dm. high; leaves shorter 



