AGROSTIDE.E. 355 



Ed. 1:582 (1848). Ammophila hrevipilis Benth. Vasey, Cat. Gr. 

 U. S. 52 (1885). 



Culms rather slender, 90-120 cm. high. Sheaths sliorter than 

 the internodes; blades very narrow, nearly flat or involute, attenu- 

 ate. Panicle pyramidal, purple. Spikelets 3.5-4.5 mm. long; 

 empty glumes ovate, mucronate, first 2-2.5 mm. long; floral glume 

 a little shorter than the second; palea equal to its glume or a little 

 longer, hairs about 1 mm. long. 



Pennsylvania (Philadel[)hia), /. B. Brinto7i. 



Sandy swamjis, pine-barrens of New Jersey. 



2. C. Curtissii Vasey, Contrib. U. S. Nat. Herb. 3:85 (1892). 

 Aimnophila Ciirtissii Yiisej, Bull. Torr. Club, 11:7 (1884). 



Culms single or in tufts, 90-180 cm. high, base of culms clothed 

 with the rigid imbricated sheaths. Sheaths 3-4 in number, distant, 

 shorter than the internodes; ligule obscure, a ciliate ring; blades 

 very smooth, firm, 10-30 cm. long, the apex setaceous. Panicle 

 12-20 cm. long; rays close, single or in pairs, the lower 4-10 cm. 

 long, 3-5 cm. distant, thinly flowered. Spikelets on short pedicels 

 4-5 mm. long; empty glumes ovate, acute or ovate-lanceolate, first 

 3-4 mm. long, second 4.5-5 mm. long; floral glume ovate-lanceo- 

 late, 5 mm. long, thinly clothed with short hairs 1-2 mm. long; 

 palea about 4 mm. long, containing a few short hairs; basal hairs 

 few, one-third as long as the floret. 



Dr. Vasey says: "It differs from A. hrevipilis Benth. in its 

 greater size, its longer involute leaves, and its much longer and 

 narrower panicle, with branches subdivided and flowering nearly to 

 the base; the latter has a ring of very short hairs at the base of the 

 outer glumes besides those at the base of the flowers." 



Florida, A. H. Curtiss. 



3. C. longifolia (Hook.). Hack. True Grasses, 113 (1890). 

 Ammojjhila longifoUa Vasey, Cat. Gr. U. S. 71 (1885). Calama- 

 grostis longifoUa Hook. Fl. Bor. Am. 2 : 241 (1840). 



Culms stout, 60-180 cm. high. Sheaths longer than the inter- 

 nodes, smooth or more or less clothed with soft wool ; blades very 

 long and narrow, involute, points attenuate. Panicle variable, 

 10-40 cm. long, at first rather narrow and close, but later spread- 



