The Flora of the Cayuga Lake Basin 71 



1. L. TEMULENTUM L. BEARDED DARNEL. 



Waste places ; rare. June-Aug. 



City dump, Ithaca, 1922 ; probably elsewhere. Scattered through the U. S. and 

 Canada. Adventive from Eu. 



2. L. perenne L. Common Darnel. Rye Grass. 



Lawns, roadsides, and fields, in rich soil ; frequent. May-Oct. 



Dryden Road, near Cascadilla Place, 1879 (D.) ; field s. of "Edgewood," rather 

 abundant (D.) ; C. U. campus, e. of Dr. Law's (Z?.) ; Agricultural College campus ; 

 Cayuga Heights Road; and elsewhere. 



Introduced generally in n. e. U. S. and s. Canada. Native of Eurasia. 



2a. L. perenne L., var. orgyiale Doll. 



Waste field, corner of Railroad and Willow Aves., Ithaca, 1919. 

 Native of Eu. 



3. L. multiflorum Lam. 



Lawn near Caldwell Hall, C. U. campus, Ithaca, 1916 (F. P. Metcalf). 

 Native of Eu. 



3a. L. multiflorum Lam., var. diminutum Mutel. 

 Lawns and fields ; occasional. 



Various parts of the Agricultural College campus. 

 Native of Eu. 



14. Elymus L. 



a. Awns straight when mature and dry; palet 5.2-8 mm. long. 



b. Empty glumes broad (0.9-2 mm. wide), strongly indurated and more or less 

 curved at base. 

 c. Empty glumes (including the awn) 1-2.7 cm. long; flowering glumes (includ- 

 ing the awn) 1-3 cm. long; spikes usually included at the base. 

 d. Glumes glabrous and smooth, or scabrous on the margins only. 



1. E. virginicus 

 d. Glumes villous-hirsute. la. E. virginicus, 



var. hirsutiglumis 

 c. Empty glumes 2.7-4 cm. long; flowering glumes (2.8) 3.5-4.5 cm. long; spikes 

 exserted ; glumes glabrous or slightly strigose-scabrous. 



2. E. australis, 



var. glabriflorus 

 b. Empty glumes narrow (0.4-0.8 mm. wide), often setiform, indurated and terete 

 below, practically straight. 

 c. Palet 7.5-8 mm. long ; flowering glumes strigose-scabrous ; joints of the rhachis 

 3-4.5 (rarely 5-8) mm. long; spikelets 2-4-flowered ; blades and sheaths not 

 hairy. 3. E. riparius 



c. Palet 5.2-6.7 mm. long; flowering glumes villous; joints of the rhachis 1.5-3 

 mm. long; spikelets 1 (2) -flowered; blades and sheaths villous. 



4. E. striatus 

 a. Awns curved outward toward the apex when mature and dry; palet 9-11 (15) mm. 

 long; flowering glumes villous-hirsute. 

 b. Leaves rather thin, very broad (13-20 mm. wide) ; spike slender and rather 

 loose, pendent from the base ; spikelets 4-7-flowered ; empty glumes 15-20 

 (rarely 8-27) mm. long, narrow but not setiform, flat toward the apex; plants 

 erect. 5. E. canadensis 



b. Leaves firmer, narrower (5-15 mm. wide), tending to be involute when dry; 

 spike somewhat denser, arching; spikelets 2-5 (usually 3-4) -flowered; empty 

 glumes 20-25 (rarely 15-35) mm. long, usually broader and flatter; plants 

 arching. 6. E. robustus, 



var. vestitus 



