FESTUCE^. 581 



rays 3-5 in half-whorls, erect or ascending, densely flowered, tlie 

 longest 4-8 cm. long. Spikelets 3-5-flowered, the longest joint of 

 rachilla 1 mm. long; empty glumes oval, acute or obtuse, almost 

 keeled, 3-nerved, first 2-3 mm. long, second 3—4 mm. long; floral 

 glume oval, scabrous, 3.5—4.5 mm. long, 5-nerved, aj)ex acute, 

 often irregularly toothed ; palea 3.5 mm. long, narrow, 2-toothed, 

 shortly ciliate on the nerves. Allied to A. tenuifolia Thnrber. 



Saribner 73 from Tweedy; Washington (Cascade Mountains), 

 JJraudegceG^o, 1190. 



16. A. unilaterale (Scribn.). Poa nniJaterale Scrib. ined. 



A tufted glaucous perennial, 20-30 cm. higii, from ascending 

 bases; culms smooth, rather stout. Ligule acute, -4-0 mm. long; 

 blades of sterile shoots flat or conduplicate, soft, flexuose, 8-12 

 cm. long, 2 mm. wide, those of the culm 2 in number, the blades 

 shorter and wider. Panicle spikelike, dense, oval-lanceolate, 5-6 

 cm. long, rays stout, very short, in threes, fours, or fives. Spikelets 

 oval or linear, 5-7-flowered, 7-10 mm. long, joint of rachilla 1 mm. 

 long; empty glumes oval, obtuse or mucronate, subcarinate; first 3- 

 nerved, 3.5-4 mm. long, second 3-5-nerved, 4-5 mm. long; floral 

 _glume 4-0 mm. long, nearly smooth, chartaceous, subcarinate, oval, 

 -abniptly or irregularly acute, mucronate; palea linear, 4-5 mm. 

 long. Grain nearly terete, 2.5 mm. long, including the spongy apex. 



California (Santa Cruz), C. L. Anderson. 



17. A. scabrella Thurb. S.Wats. Bot. Calif. 2:310 (1880). 

 Poa scahrella Yasey, Cat. Grass. U. S. 84 (1885). 



A slender perennial, 40-70 cm. high, scabrid. Blades of sterile 

 shoots flat or conduplicate, 12-20 cm. long, 1-2 mm. wide, curved; 

 leaves of the culm 2-3, lignle 5-12 mm. long, acute; blades 5-7 cm. 

 long. Panicle narrow, 12-15 cm. long, rather dense, rays in pairs, 

 the longest 5-7 cm. long, branching and mostly flower-bearing to 

 the base. S^iikelets 5-6 mm. long, 3-5-flowered, joint of rachilla 

 1 mm. long; empty glumes 3-nerved, first about 2.5 mm., second 

 about 3 mm. long; floral glume 3-3.2 mm. long, oval, rough-hairy 

 on the lower part of the nerves, apex denticulate, often mucronate ; 

 palea but little shorter. 



Lower California, ^f^s^ F. E. Fish for Nat. Mus. 



