HITCHCOCK AND CHASE—GRASSES OF THE WEST INDIES. 327 
Culms firm, erect or decumbent at base only ; 
blades 8 to 8 em. long; Trinidad. 
44, P. cyanescens. 
Panicles 10 to 20 cm. long, very diffuse; plants 
tall, not glaucous, decumbent at base. 
Spikelets viscid, 8 mm, long. 
47. P. glutinosum. 
Spikelets not viscid, 2 to 2.3 mm. long. 
46. P. millegrana. 
First glume pointed, usually less than two-thirds 
as long as the pointed spikelets. 
Spikelets not over 1.4 mm, long, pubescent; 
panicle large, diffuse; culms straggling. 
42. P. trichanthum. 
Spikelets 2 to 3.5 mm. long. 
‘Spikelets sparsely hispid; culms stout, woody. 
48. P. rudgei. 
Spikelets glabrous. (DIFFUSA.) 
Culms as much as 1 cm. thick; blades 2 cm, 
or more wide_____--- 19. P. hirsutum. 
Culms slender; blades not over 1 cm. wide. 
Blades 1 to 3 mm. wide; spikelets 2 to 2.5 
mm. long; culms glabrous; sheaths 
glabrous or nearly so; plants spread- 
ing or ascending.__17%. P. diffusum. 
Blades mostly about 1 em. wide; spikelets 
3 mm. long; culms and sheaths hir- 
sute; plants mostly erect. 
18. P. ghiesbreghtii. 
Subgenus PAUROCHAETIUM Hitche. & Chase. 
1. Panicum distantiflorum A. Rich. in Sagra, Hist. Cuba 11: 304. 1850. 
Limestone hills at low altitudes, Bahamas to Cuba and Haiti, and in Curacao. 
Originally described from Cuba. 
2. Panicum utowanaeum Scribn. in Millsp. Field Mus. Bot. 2: 25. 1900. 
Open rocky soil, mostly near the coast, Cuba, Porto Rico, Guadeloupe, and 
Venezuela. Originally described from Porto Rico. 
3. Panicum chapmani Vasey, Bull. Torrey Club 11: 61. 1884. 
Coral sand and shell mounds, southern Florida and the Bahamas. Originally 
described from Florida. 
TRUE PANICUM. 
4. Panicum geminatum Forsk. Fl. Aegypt. Arab. 18, 1775. 
Moist ground, ditches, and swamps, mostly near the coast, tropical regions of 
both hemispheres, in America extending north into southern Florida and 
Texas; throughout the West Indies. Originally described from Rosetta, Egypt. 
5. Panicum barbinode Trin. Mém. Acad. St. Pétersb. VI. Sci. Nat. 1: 256. 1834. 
PARA GRASB. 
Cultivated and waste ground, especially in moist places, tropical America, 
extending into southern Florida and Texas; introduced in the warmer parts 
of the Old World. Originally described from Bahia, Brazil. A valuable forage 
