HITCHCOCK AlTD CHASE TROPICAL NORTH AMERICAN PANICUM. 499 



None of the specimens collected is mature. It may be that the large sterile palea 

 becomes indurated at maturity as in P. Mans and its close allies. The species is 

 named in honor of Dr. F. L. Stevens of the University of Illinois, who, during the 

 three years he was dean of the College of Agriculture and Mechanic Arts of Porto Rico, 

 was an ardent student of the flora of the island and who contributed greatly to the 

 success of a botanical trip made by one of the authors to Porto Rico in 1913. 



Since this work went to press a second collection of this species has been re- 

 ceived: Wilson 9558, Laguna de Castellano, Cuba. 



56. Panicum exiguiflorum Griseb. 



Panicum exiguiflorum Griseb. Cat. PI. Cub. 234. 1866; Contr. U. S. Nat. Herb. 15: 

 117, 1910. 



DISTRIBUTIOiN. 



Savannas and moist sandy woods, Bahamas and Cuba. The type specimen from 

 Cuba. 



Bahamas: Fortune Island, Hitch- 

 cocJc in 1890. 

 . Cuba: Hanabana, Wright in 1865. 

 Sancti Spiritus, Sergius 2566. 

 Obispo Hill, Leon 902b . Zaza 

 del Medio, Leon 902. Guana- 

 bacoa, Leon 911, 913. Chiri- 

 gote, WrigJitS450. Herradura, 

 Eitchcockl79, Tracy 9075. Isle 

 of Pines, Taijlor35. Without 

 locality, Wright7o5, 3450, 3877. 



Fig. 78.— Distribution of P. exiguiflorum. 



57. Panicum hians Ell. 



Panicum hians Ell. Bot. S. C. & Ga. 1: 

 118. 1816; Contr. U. S. Nat. Herb. 15: 118. 

 1910. 



DISTRIBUTION. 



Savannas and moist soil along ponds and 

 streams, North Carolina to New Mexico and 

 in Veracruz, Mexico. The type specimen 

 from South Carolina. 



Fig. 79.— Distributiou ot F, Mans. 



Veracruz: Jalapa, Schiede. 

 locality, Milller 2095. 



"Without 



58. Panicum cupremn Ilitchc. & Chase. 



Panicum cupreum Hitchc. & Chase, Contr. 

 U. S. Nat. Herb. 15: 120. 1910. 



DISTRIBUTION. 



Only known from the type collection, in 

 "wet hollows in prairies of Flor de Maria, 

 State of Mexico," Pringle 3449. 



QliA^t^'C'^-*^ : ■<<L.^.^*.'v^,-o»_ 5 riaJbtM^^tm^^ Fig. SO.— Distribution of P. cupreum. 





S ^^~ 



