378 POACE.E. 



shining, green and purple. Spikelets slightly flattened, 2-flowered, 

 rachilla slightly hairy, produced beyond into a bristle, sometimes 

 bearing a rudiment of a third spikelet; empty glumes oval, acute, 

 first 4-5 mm. long, 1-nerved, second 5-5.5 mm. long, 3-nerved; 

 floral glume oval, acute, 4.5-5.5 mm. long, including the short 

 teeth, obscurely 5-nerved, the upper third brown-scarious, the bent 

 awn extending 3-5 mm. beyond its glume; palea nearly as long as 

 its glume; anthers 1.3 mm. long. 



Nearly allied to T. syicatum. 



Mexico, Pringle 4303, on the mountains. 



9. T. sesq[uiflorum Trin. Bull. Sc. Acad. St. Petersb. 1 : 66 

 (1836). 



Perennial; culms 15-25 cm. high, and glabrous throughout. 

 Leaf -blades of sterile shoots often reaching to the top of the panicle, 

 those of the culm shorter, the upper one 1 cm. long. Panicle 

 dense, linear-oblong, 3-4 cm. long. SiDikelets narrow, purple ; some 

 of them consisting of four empty glumes, first and second 1-nerved, 

 third bifid, awned, 3-nerved, fourth 2-nerved; the other spikelets 

 l_2-flowered, empty glumes lanceolate, compressed-keeled, very 

 nearly equal, 6-7 mm. long, first 1-nerved, second 3-nerved, rachilla 

 consisting of a few short hairs; floral glume thin, 5 mm. long, 2 

 mm. wide, obscurely 5-nerved, the tips lacerate, awn starting but 

 little below the middle, and reaching 4 mm. above its glume; palea 

 obtuse, lacerate, a little shorter than its glume, 1.5 mm. wide. 

 Anthers linear, 3 mm. long, which is three times the length of 

 those in T. suhspicatum, collected in the same locality. The plants 

 have much the aspect of those last named. 



Alaska, Harrington with the U. S. Coast Survey. 



Alaska and Kamtchatka. 



10. T. Sandbergii n. sp. 



Panicle purple, lax, flexuose or nodding, 15-20 cm. long, rays 

 in distant half-whorls of 3-4, the longest 4-6 cm. long, bearing a 

 few spikelets on the outer third. Spikelets 2-flowered, the hairy 

 pedicel nearly 3 mm. long; first glume lanceolate, 3-4 mm. long, 

 1-nerved, second oval when spread, about 5 mm. long, 3-uerved; 

 first floral glume elliptical, acute when spread, with a few very short 



