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. 8. Nat. Herb. 15: 207. 
1910. 
DISTRIBUTION. 
Moist sandy soil, Massachusetts to 
Texasand Cuba. The type specimen 
from Cuba. 
Cusa: Pinar del Rio, Britton & 
Gager 6952. Without locality, 
Wright 3463 in part. 
Fig. 119.—Distribution of P. wrightianwm. 
LANUGINOSA. 
Spikelets 2.2 mm. or more long. 
Pubescence on culms horizontally spreading; autumnal 
pOTMeireehypbranchpmm 2. ea 97. P. villosissimum. 
Pubescence on culms appressed or ascending; autumnal 
form rather sparingly branching............1.... 98. P. pseudopubescens. 
Spikelets not over 2 mm. long. 
Plants not velvety; blades usually glabrous on the upper 
SYUIBIONCIS 5 Ae ge Mare Pv cee a SN I BON 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. 
Panicum tennesseense Ashe, Journ. Elisha 
Mitchell Soc. 15: 52. 1898; Contr. U. S. 
Nat. Herb. 15: 218. 1910. 
DISTRIBUTION. 
Open ground, Atlantic States to Utah; 
also in southern Mexico. The type speci- 
men from Tennessee. 
Veracruz: Orizaba, Boéttert 101. 
Jalapa, Hitchcock 6632. 
¥1G. 120,— Distribution of P. tennesseense. 
95. Panicum acuminatum Swartz. 
Panicum acuminatum Swartz, Prodr. Veg. Ind. Occ. 23. 1788; Contr. U. S. Nat. 
Herb. 15: 222: 1910. 
Panicum ornatum Desyv.; Hamilt. Prodr. Pl. Ind. Occ. 11. 1825. ‘‘ Herb. Prof. 
Desy. 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. 
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