GRAA1INEAE. VOL. I. 



10. Elymus hirsutiglumis Scribn. Strict Wild 

 Rye. Fig. 709. 



Elymus canadcnsis var. intermediits Vasey ; Wats. & Coult. 



in A. Gray, Man. Ed. 6, 673. 1890. 

 Elymus hirsutiglumis Scribn. U. S. Dep. Agr. Agrost. n : 



58. 1898. 



Culms erect from a perennial root, 2-3 tall, 

 smooth and glabrous. Sheaths longer than the inter- 

 nodes, smooth, the uppermost often inflated and en- 

 closing the base of the spike; ligule a short mem- 

 branous ring; blades 7'-i2 r long, 4"-o/' - wide, acuminate, 

 very rough on both surfaces ; spikes 2i'-6' long, stout, 

 the rachis pubescent ; spikelets crowded, in pairs, 

 2-5-flowered ; empty scales linear, 5" -6" long, thick, 

 3-5-nerved, the nerves hirsute, acuminate into a sca- 

 brous awn as long as or shorter than the scales ; flow- 

 ering scales lanceolate, 5-nerved, appressed-hirsute, 

 4"-$" long, acuminate into a rough awn 6"-8" long. 



River banks, Maine to Virginia, Tennessee, Missouri 

 and Nebraska. July-Aug. 



ii. Elymus australis Scribn. & Ball, 

 ern Wild Rye. Fig. 710. 



South- 



Elymiis australis Scribn. & Ball, Bull. U. S. Dep. Agr. 

 Agrost. 24: 46. /. 20. 1901. 



Culms 3-4 tall, erect; sheaths glabrous or hir- 

 sute; blades up to i long, 5"-8" wide, rough, 

 sometimes hirsute on the upper surface; spike 4'-6' 

 long, i'-ii' in diameter over all, exserted; empty 

 scales thick, indurated and curved at the base, usu- 

 ally hirsute, long-attenuate into a long awn, the 

 flowering scales 4"-s" long, hirsute, bearing a his- 

 pidulous awn i'-ii' long. 



Moist woods and thickets, Connecticut to Missouri, 

 south to Florida and Arkansas. June-Aug. 



12. Elymus glabriflorus (Vasey) Scribn. & 

 Ball. Smooth Southern Wild Rye. Fig. 711. 



Elymus canadensis glabriflorus Vasey ; Dewey, Contr. U. 



S. Nat. Herb. 2 : 550. 1894. 

 Elytmis glabriflorus Scribn. & Ball, Bull. U. S. Dep. Agr. 



Agrost. 24: 49. /. 23. 1901. 



Culms 2-3 tall, erect, stout; sheaths glabrous or 

 hirsute; blades up to i long, 3" -5" wide, flat or 

 nearly so, rough, sometimes sparsely hirsute on the 

 upper surface; spike 4'-6' long, stout, sometimes 

 nodding; spikelets 2-3 at each node, the empty scales 

 thick, indurated and somewhat curved at the base, 

 strongly nerved, sometimes ciliate on the margins, 

 attenuate into a long hispidulous awn, the flowering 

 scales glabrous or hispidulous, bearing a long his- 

 pidulous awn. 



Low woods or thickets, Pennsylvania to Iowa, south 

 to Florida, Texas and New Mexico. June-Aug. 



