282 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



Glumes papery; lemmae firm, Bcarious-margined ; upper florets sterile, 

 folded together, forming a club-sliaped rudiment behind the 



uppermost palea 19, MELICA. 



Glumes not papery; upper florets similar to the others. 



Lemmas entire, awned from the tip or pointed . . 24. FESTUCA. 

 Lemmas awned or awn-tipped from a minutely 2-toothed apex. 



25. BROMUS. 

 1. CHAETOCHLOA Scribn. 



1. Chaetochloa viridis (L.) Scribn. Green foxtail. Dry gravel bank, Belton, 

 only one or two plants seen. Native of Eur.; natumlized in N. Amer. — Plants 

 annual, 30 to 50 cm. tall, with flat blades about 1 cm. wide and a single dense green 

 bristly head 3 to 10 cm. long. 



2. PHALARIS L. Canary grass. 



1. Phalaris arundinacea L. East entrance, in wet soil. B. C. to Nev., N. J., 

 and N. S.; also in Eur. and Asia. — Plants perennial, with running rootstocks, pale 

 green, 1 meter or more tall, the culms simple, with drooping blades 1 to 2 cm. broad, 

 and a pale dense narrow panicle 8 to 15 cm. long; spikelets flattened, the glumes 

 keeled and abruptly pointed, the hard, shining, flat, minutely pubescent fruits 

 readily shelling out. 



3. TORRESIA Ruiz & Pav. 



1. Torresia odorata (L.) Hitchc. Vanilla grass. Meadows about the east 

 entrance, and doubtless elsewhere. Alaska to N. Mex., N. J., and Lab.; also in 

 Eur. and Asia. (Hkrochloa odorata Wahl.; Savaslana odorata Scribn.)- — Plants 

 perennial, with brownish rootstocks, growing in small colonies, the simple culms 

 30 to 50 cm. tall, with soft flat blades and an open panicle 5 to 8 cm. long -with 

 spreading or drooping branches and broad, shining, pale bronze spikelets. 



Known also as holy grass, Seneca grass, and sweetgrass. The entire plant is 

 fragrant, even when dry. The fragrant grass baskets woven by the Indians are 

 made from this species. The Blackfoot Indians used the grass as incense in some 

 of their ceremonials, and a decoction of it was employed as a hair tonic. The 

 Sweetgrass Hills, which lie east of the park, derive their name from the plant. 



4, STIPA L. Porcupine grass. 



Erect perennial bunchgrasses with simple culms, narrow blades, and terminal 

 panicles; glumes thin; longer than the body of the terete (nearly cylindric) floret; 

 awn 3 to 5 times as long as the body, twice bent. 



Panicle open, the branches spreading or drooping 1, S. richardsonii. 



Panicle narrow, the short branches erect. 



Sheaths hairy at the throat 2. S. viridula. 



Sheaths not hairy at the throat 3. S. nelsonii. 



1, Stipa richardsonii Liuk. At St. Mary Lake and doubtless elsewhere at low 

 altitudes. Alta. to Colo, and S. Dak. — Leaves involute, rough, 10 to 15 cm. long, 

 crowded at the base of the slender, nearly naked culms; panicles 10 to 20 cm. long, 

 the long capillary branches mostly in pairs, with bronze-purple spikelets on capillary 

 pedicels borne toward the ends. 



2, Stipa viridula Trin. Frequent at middle altitudes, in woods or on cliffs or 

 open slopes, Mont, to Utah, Kans., and Sask. — Plants 0.6 to 1 meter tall, leafj' 

 throughout, the blades rough, more or less involute, 20 to 40 cm. long; panicle pale 

 and shining, 15 to 30 cm. long, about 2 cm. wide, rather densely flowered; glumes 

 8 to 10 mm. long; body of the floret usually 5 to 6 mm. long, the awn 3 to 4 cm. long. 



