HITCHCOCK AND CHASE—TROPICAL NORTH AMERICAN PANICUM. 519 
. 
93. Panicum wrightianum Scribn. 
Panicum wrightianum Scribn. U. 8. Dept. Agr. Div. Agrost, Bull. 11: 44. f. 4. 1898. 
Contr. U. S. Nat. Herb. 15: 207. 
1910. 
DISTRIBUTION. 
Moist sandy soil, Massachusetts to 
Texas and Cuba. The type specimen 
from Cuba. 
Cusa: Pinar del Rio, Britton & 
Gager 6952. Without locality, 
Wright 3463 in part. 
Fia. 119.—Distribution of P. wrightianum. 
LANUGINOSA. 
Spikelets 2.2 mm. or more long. 
Pubescence on culms horizontally spreading; autumnal 
form freely branching..................2.....-- 97. P. villosissimum. 
Pubescence on culms appressed or ascending; autumnal 
form rather sparingly branching................. 98. P. pseudopubescens, 
Spikelets not over 2 mm. long. 
Plants not velvety; blades usually glabrous on the upper 
surface. ....-2 22 e eee 94. P. tennesseense. 
Plants velvety; blades softly pubescent on both surfaces. 
Plants light or yellow green when dry............. 95. P. acuminatum. 
Plants dark or olive green when dry............... 96. P. olivaceum. 
94. Panicum tennesseense Ashe. 
Cee Panicum tennesseense Ashe, Journ. Elisha 
i tesiic| Mitchell Soc. 15: 52. 1898; Contr. U. 8. 
, Nat. Herb. 15: 218. 1910. 
me > DISTRIBUTION. 
Wwe K Open ground, Atlantic States to Utah; 
OPN also in southern Mexico. The type speci- 
Y mpaN S| men from Tennessee. 
MA, ae 
S VERACRUZ: Orizaba, Bottert 101. 
Jalapa, Hitchcock 6632. 
FIG. 120.—Distribution of P, tennesseense. 
95. Panicum acuminatum Swartz. * 
Panicum acuminatum Swartz, Prodr. Veg. Ind. Occ. 23. 1788; Contr. U. 8. Nat. 
Herb. 15: 222. 1910. 
Panicum ornatum Desv.; Hamilt, Prodr. Pl. Ind, Occ. 11. 1825. ‘‘ Herb. Prof. 
Desv. Porto Rico.” 
In the Revision! this was listed among the doubtful species, The inadequate 
description indicates the common P. acuminatum. 
1Contr. U. 8. Nat. Herb. 15: 331. 1910. 
