518 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
90. Panicum roanokense Ashe. 
Panicum roanokense Ashe, Journ. Elisha Mitchell Soc. 15: 44. 1898; Contr. U. 8. 
Nat. Herb. 15: 196. 1910. 
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. Panicum caerulescens Hack. 
Panicum caerulescens Hack.; Hitche. Contr. U. 8. 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. 
Bawamas: Great Bahama, Brace 
3524, Britton d& Millspaugh 
2506, 2668. Andros, Brace 
7015 (allin Field Mus. Herb.). 
New Providence, Britton & 
Brace 597, 599, Millspaugh 
2182, Northrup 248, Eggers 
4305 (Hackel Herb.), Eggers 
4312 (K. U. Herb.). 
Cusa: Without locality, Wright 
3463 in part. Fig. 117.—Distribution of P. caerulescens. 
SPRETA., 
Spikelets 1.2 to 1.3 mm. long...............2................. 92. P. leucothrix. 
Spikelets not over 1 mm. long. ..........2................... 93. P. wrightianum. 
92. Panicum leucothrix Nash. 
Panicum leucothrix Nash, Bull. Torrey Club 24: 41, 1897: Contr. U. 8. 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. 
Cusa: Herradura, Hitchcock 554, 
560. Without locality, Wright 
3460, 3463. 
Fig. 118.—Distribution of P. teucothriz, Ponte Rico: Trujillo Alto, Chase 
