HITCHCOCK AND CHASE—TROPICAL NORTH AMERICAN PANICUM. 463 
Culms stout, erect or nearly so; spikelets 
turgid, sparsely hirsute. 
76, P. rudgei. 
Spikelets glabrous. 
Culms straggling; spikelets minute. 
68. P. trichanthum. 
Culms erect or stiffly ascending; blades 
linear, usually elongated. 
Sheaths glabrous; culms 1.5 to 2 meters 
high........ 40. P. ichnanthoides. 
Sheaths hirsute, or if glabrousthe culms 
less than 1 meter high. _ 
See Dirrusa, p. 480. 
ANNOTATED LIST OF THE SPECIES. 
Subgenus PAUROCHAETIUM Hitche. & Chase. 
Blades less than 10 cm. long, not narrowed toward the base; 
spikelets about 2.5 mm. long...........-..............- 4. P. ramisetum, 
Blades elongated, usually more than 15 cm. long, narrowed 
toward the base. 
First glume rounded or truncaté} second glume about as 
long as fruit...... wee cee eee eee eee eee eee 3. P. chapmani. 
First glume acute; second glume about two-thirds as long-as 
fruit. 
Spikelets 1.5 mm. long; blades involute............... 1. P. distantiflorum. 
Spikelets 2 mm. long; blades flat...... cece cece eee cece 2. P. utowanaeum. 
1. Panicum distantiflorum A. Rich. 
Panicum distantiflorum A. Rich. in Sagra, Hist. Cuba 11: 304. 1850; Contr, U.S. 
Nat. Herb. 15: 23. 1910. 
DISTRIBUTION. 
Limestone hills at low altitudes, Bahamas to Cuba and Haiti; Curacao. The type 
specimen from Cuba, 
Banamas: Inagua, Hitchcock in r 
1890, Nash & Taylor 893 (both 
Field Mus. Herb.). 
Cusa: Playade Cojimar, Hitchcock 
144, Leén 912. Near Habana, 
Le6n305 b, 567, 2382. Santiago, 
Le6n917. Sillade Cayo, Shafer 
2512. Guanoroca, Wright 284. 
Handbana, Wright 285. Playa 
de Marianao, Leén in 1909. Fig, 11.—Distribution of P. distantiflorum, 
Without locality, Wright 3452. 
Santo Dominco: Naranjo, Fuertes 1284. Los Charcos, Fuertes 1427. 
Curacao: Britton & Shafer 3088. Bonaire, Suringar in 1885. (K. U. Herb.)! 
1 Krug & Urban Herbarium. 
