’ GRASSES. 219 
Tricuspis mutica, Torr. New Mexico. 
* Tricuspis pulchella, Torr. Mountains. 
Tricuspis purpurea, Gray. Plains. East to the Atlantic. 
Graphephorum flexuosum, Thurb. Plains. 
Diarrhena Americana, Beauv. Timber belts—plains. East to Ohio. 
Keleria cristata, Pers. Mountains and plains. Hast to the Atlantic. 
Eatonia Pennsylvanica, Gray. Mountains. East to the Atlantic. 
Eatonia obtusata, Gray. Mountains. Hast to Pennsylvania. 
Glyceria aquatica, Smith. Mountains. Northeastward. 
Glyceria pauciflora, Torr. High mountains. 
Glyceria airoides, Thurb. Mountain valleys. 
Glyceria nervata, Trin. Wet soils and swamps. East to the Atlantic. 
Brizopyrum spicatum, Beauv. Plains. East tathe Atlantic. 
Poa annua, Lin. Plains and mountains. East to the Atlantic. 
Poa Alpina, Lin. High mountains. Northeastward to the Atlantic. 
Poa memoratis, Lin. Mountains. 
Poa Andina, Nutt. Mountains. 
Poa arctica, R. Br. Mountains. 
Poa serotina, Ehbrh. Mountains. Northeastward. 
Poa crecata, Michx. Mountains. : 
Poa pratensis, Lin. Mountains. The European variety. Eastward to the Atlantic. 
Eragrostis Purshii, Schrad. Plains. Southeast to Virginia. 
Hragrostis tenuis, Gray. Plains. East to Illinois. 
Lragrostis oxylepis, Torr. Plains. 
Eragrostis reptans, Nees. Wet places. East to the Atlantic. 
Eragrostis megastachya, Link. Plains, &c. East to the Atlantic. 
Eragrostis pectinacea, Gray. Plains, &c. East to Massachusetts. 
Eragrostis capillaris, Nees. Plains. Southeastward. 
Festuca ovina, Lin. Mountains and plains. Northeastward to New England. 
Festuca pauciflora, Thurb. Mountains. 
Festuca rubra, Lin. Mountains and plains. 
Festuca scabrella, Torr. Mountains. 
Festuca tenella, Willd. Mountains and plains. Eastward to the Atlantic. 
Festuca macrostachya, Torr. Mountains, &c. New Mexico. 
Festuca nutans, Willd. Timber belts. Eastward to the Atlantic. 
Bromus Kalmii, Gray. Mountains and plains. Northeastward. 
Bromus ciliatus, Liu. Mountains and plains, Eastward to the Atlantic. 
Ceratochloa grandiflora, Hook. Mountains. 
Sesleria dactyloides, Nutt. 
Uniola stricta, Torr. 
Uniola latifolia, Michx. Timber belts. East to Pennsylvania. 
Phragmites communis, Trin. Ponds, &c. East to the Atlantic. 
Lepturus paniculatus, Nutt. Plains. East to Ilinois. 
Buchloe dactyloides, Engelm. Plains. The buffalo grass of the region. 
Monroa squarrosa, Torr. Plains. 
Triticum repens, Lin. Plains and mountains. Naturalized eastward. 
Triticum caninum, Lin. Plains and mountains. Naturalized eastward. 
Triticum egilopoides, Turez. Mountains and plains. 
Hordeum jubatum, Ait. Plains and mountains. East to the Atlantic. 
Hordeum pusillum, Nutt. Plains. East to Ohio. . 
Elymus Canadensis, Lin. Plains and mountains. East to the Atlantic. 
Elymus Virginicus, Lin. Plains and mountains. East to the Atlantic. 
Elymus Sibiricus, Lin, Mountains and plains. Northeast to Minnesota. 
Elymus striaius, Wilid. Timber belts. Hast to the Atlantic. 
Elymus condensatus, Presl. Mountains. 
Elymus triticoides, Nutt. Mountains. 
Sitanion elymoides, Raf. Mountains. 
Gymnostichum hystrix, Schreb. Timber belts. East to the Atlantie, 
Danthonia sericea, Nutt. Mountains. East to Massachusetts, 
Danthonia spicata, Beauv. ‘Timber belts. East to the Atlantic. 
Avena striata, Michx. Mountains. East to New England. 
Aira cespitosa, Lin. Mountains. Northeastward. 
Hierochloa borealis, Roem. & Schult. Mountains. Northeast to the Atlantic. 
Phalaris arundinacea, Lin. Wet localities. Northeastward. 
Paspalum setaceum, Michx. Plains. East to the Atlantic. 
Beckmannia erucaformis, Host. Mountain ponds, 
Chloris verticillata, Nutt. Plains south. 
Chloris alba, Presl. Plains. 
Panicum clandestinum, Lin. Timber belts. Kast to the Atlantic. ‘ 
Panicum capillare, Lin. Various localities. The whole country. 
