No. 50. 189 
MUHLENBERGIA, (continued.) | — 7 
cinna, Trin. Cinna arundinacea, Z. Swamps and wet shady 
woods. August. 
diffusa, Schreb. Rocky hill sides and fields. August. 
Vitra, Adans. 
serotina, Torr. in Gray’s Gram. §- Cyp. Agrostis serotina, Torr. 
fi. Sandy swamps, Long Island. September. 
vagineflora, Torr. /.c. Agrostis virginica, Muhl., not of Linn. 
Sandy soils and sterile hill sides. September- 
October. 
longifolia, Torr. 1. c. Agrostis longifolia, Torr. fl. Sandy fields, 
Long Island, September. 
heterolepis, Gray. Rocks, Jefferson county. Dr. Gray. Au- 
gust-September. 
Auorsecurus, L: Fox-tail Grass. 
§ pratensis, L. Fields and'pastures. June. 
geniculatus, L. Wet meadows. June. 
Var. aristulatus, Torr. A. aristulatus, Miche. With the pre- 
ceding. 
Pureum, L. Cat-tail Grass. 
§ pratense, L. Tumothy, Herds Grass. Fields. June-August. 
Puataris, L. Canary Grass. 
arundinacea, 4. Swamps. July. — 
§ canariensis, £. Fields and pastures. 
Mitium, L. Millet Grass. 
effusum, Z. Wet woods. July. Northern and western counties. 
pungens, Torr. Rocky hills. May. 
Pipratuerum, P. de Beauv. | 
nigrum, Torr. Oryzopsis melanocarpa, Muhl. Rocky woods. 
August. 
Stipa, L. Feather Grass. 
avenacea, L. Dry woods and hill sides.. June. 
Oryzopsis, Michz. 
asperifolia, Michx. Mountain Rice. Woody hill sides; western 
counties. April-May. 
