518 CONTRIBUTIONS FEOM THE NATIONAL HERBARIUM. 



90. Panicum roanokense Ashe. 



Panicum roanohense Ashe, Joiim. Elisha Mitchell Soc. 15: 44. 1898; Contr. U. S. 

 Nat. Herb. 15: 196. 1910. 



7 H 



DISTRIBUTION. 



Open swampy woods and wet 

 meadows, Virginia to Texas; also in 

 Jamaica. The type specimen from 

 North Carolina. 



.Jamaica: Bull Head Mountain, 



Hitchcock 9530. 



Fig. 116. — Distribution of P. roanokense. 



91. Panicuin caerulescens Hack. 



Panicum caerulescens Hack.; Hitchc. Contr. U. S. Nat. Herb. 12: 219. 1909; 15: 

 197. 1910. 



distribution. 



Marshes and swampy woods, New Jersey to Florida and Mississippi, Bahamas and 

 Cuba. The type specimen from Florida. 



Bahamas: Great Bahama, Brace 



3524, Britton & Millspaugh 



2506, 2668. Andros, Brace 



7015 (all in Field Mus. Herb . ) . 



New Providence, Britton & 



Brace 597, 599, Millspaugh 



2182, Northrup 248, Eggers 



4305 (Hackel Herb.), Eggers 



4312 (K. U. Herb.). 

 Cuba: Without locality, Wright 



3463 in part. 



Fig. 117. — Distribution of F. caerulescens. 



SPRETA. 



Spikelets 1.2 to 1.3 mm. long 92. P. leucothrix. 



Spikelets not over 1 mm. long 93. P. wrightianum. 



92. Panicum leucothrix Nash. 



Panicum leucothrix Nash, Bull. Torrey Club 24: 41. 1897; Contr. U. S. Nat. Herb. 

 15: 205. 1910. 



distribution. 



Pine woods and moist open ground, 

 New Jersey to Louisiana, Cuba, and 

 Porto Rico. The type specimen from 

 Florida. 



Cuba: HeiTadura, Hitchcock 554, 

 560. Without locality, Wright 

 3460, 3463. 

 Porto Rico: Trujlllo Alto, Chase 



Fig. 118.— Distribution of P. leucothrix. 



