Vol. III.] 

 [Vol. I: 



APPENDIX. 



?26.] la. Agropyron pseudorepens Scribn. & Sm. 

 Couch-grass. (Fig. 524a.) 



Agropyron pseudorepens Scribn. & Sm. Bull. U. S- 

 Dept. Agric. Div. Agrrost. 4: 34. 1897. 



Light greeu. Culms i°-3° tall, erect, smooth 

 and glabrous, from a running rootstock; sheaths 

 shorter than the intern odes, smooth; ligule a short 

 membranous ring; leaves erect, prominently 

 nerved, rough on both surfaces, acuminate, the 

 culm leaves 3'-8' long, 2"-%," wide, the basal 

 leaves about one-half as long as the culms; spikes 

 3'-S' long, strict; spikelets 5"-S" long, 3-7-flow- 

 ered, a tillle compressed, oppressed to the rachis 

 which is hispidulous on the margins; empty scales 

 lanceolate, equalling or somewhat shorter than the 

 spikelet, acuminate and often awn-pointed, 5-7- 

 nerved, the nerves hispidulous; flowering scales 5- 

 nerved, roughish toward the apex, usually awn- 

 pointed. 



Rich river bottoms, Montana to British Columbia, 

 south to Nebraska, Arizona and Texas. July-Aug. 



[Vol. 



507 

 False 



p. 226.] lb. Agropyron spi- 

 catum (Pursh) Scribn. & Sm. Western 

 Wheat-grass. (Fig. 524b.) 



Festuca spicata Pursh, Fl. Am. Sept. 1:83. 1814. 

 Agropyron spicalum Scribn. & Sm. Bull. U. S. 



Dept. Agric. Div. Agrost. 4: t^t,. 1897. 



Pate green, glaucous. Culms i)4°-4° tall, 

 erect, from a slender creeping rootstock, smooth 

 and glabrous; sheaths shorter than the inter- 

 nodes, smooth; ligule a short membranous 

 ring; leaves erect, 2'-S' long, 2"-4" wide, acu- 

 minate, very scabrous above, smooth beneath, 

 becoming involute when dry; spike long-ex- 

 serted, strict, 4'-8' long; spikelets crowded, 

 divergent from the rachis, compressed ,\3M<::e.o\^\.^ 

 when closed, Y^'-V long, 6-12-flowered; empty 

 scales acuminate, awn-pointed, shorter than the 

 spikelet, hispidulous on the keel; flowering 

 scales 5"-6" long, acute or awn-pointed, gla- 

 brous or sparsely pubescent. 



Moist land, Manitoba and Minnesota to Oregon, 

 south to Missouri and Texas. 



[\'ol. I: p. 226.] ic. Agropyron tetra- 



stachys Scribn. & Sm. Coast Wheat-grass. 



(Fig. 524c.) 



Agropjfron lelraslachys Scribn. & Sm. Bull. U. S. Dept. 

 Agnc. Div. Agrost. 4: 32. 1897. 



Glaucous. Culms rigid, slender, erect, i^°-3° tall, 

 from a runnint; rootstock; sheaths shorter than the in- 

 nodes, smooth and glabrous; ligule wanting; leaves 

 erect, acuminate, 5'-8' long, 2" or less wide, smooth 

 beneath, glaucous above, scabrous on the margins; 

 spikes long-e.xserted, 3'-5' long, 4-sided; spikelets 

 crowded, 6'''-io" long, 6-ii-flowered, apprcssed to the 

 4-angled articulated rachis, the angles hispidulous; 

 empty scales lauceolate, 5" long, rough on the keel, 

 5-7-nerved; flowering scales lanceolate, keeled, rough 

 toward the apex, acute, awn-pointed or short-awued. 



Sandy beaches, coast of Maine. July-Aug. 



