FESTrOE/E. 537 



ion', Michigan, Sm'bner 3488 from Wheeler, Cooh'ij, Bcal 12:2, 123, 

 (Flint) Clark 12!»8. 



12. P. sylvestris A. Gray, .Man. Ed. 1 : 5!)G (1S48). 



A soft smooth palo-groen tufted erect perennial, (!0-8() cm. high; 

 culms flattish. Sheaths smooth or scabrid, mostl} shorter than the 

 iuteruodes; ligule ol)tuse, lacerate, 1.5 mm. long; blades of sterile 

 shoots soft, flat, acuminate, 10-1.5 cm. long, 2-3 mm. wide, those 

 of the culm 4 in number, acute or ai-uminalc, (i-lO cm. long, 3-4 

 mm. wide. Panicle open, oblong-pyramidal, 10-15 cm. long, rays 

 slender, in fours to sevens in about ten sets, often drooping, the 

 longest 4-G cm. long, bearing a few branches beyond the middle. 

 Spikelets pedicellate, oblong or wider, 3-4 mm. long, usually 2-3- 

 llowered, joint of rachilla 0.(!-0.7 mm. long, first empty glunu' 1.7- 

 2.3 mm. long, ovate-acute, 1-nervcd, second oval-acute, 3-ncrvcd, 

 2-2.7 mm. long; floi'al glume oval, obtuse or sul)acute wlien .s})read, 

 2.5-3 mm. long, keel and. marginal nerves villous for nearly tlieir 

 entire length to the narrow scarious apex, sparingly webbed at the 

 base; palea oval, 2-tootlied, 2-2.2 mm. long, ciliate on tlie keck. 



Delaware, Cauhy; Disti'ict of Columbia, Vusey for U. S. Dept. 

 Agricul. GG9; ;Mi(!higau, Beal c(- ]]li€eler 124. 



Woods, Delaware, Xcw York to A^'isconsin and southward. 



13. P. conglomerata Ilupr. Bull. Acad, lirux. 0: Tart 2, 236 

 (1842). 



A rather soft and nearly smooth light-green perennial, 30-50 cm. 

 high. Culms Aveak and compressed; nodes 2-3. Leaves of sterile 

 shoots not numerous; ligule 2 mm. long; blades flat, acute, 5-8 

 cm. long, 1.5 mm. wide, blades of tlie culm much tlie same. I'an- 

 iolo slender, spikelikc, 8-15 cm. long, rays mostly in pairs, aji- 

 pressed, the lowest distant 2-3 cm., tlie longest 2-4 cm. long, bear- 

 ing short nearly sessile branches for most of its length. Spikelets 

 ovid, acute, 3-flowered. 3-4 mm. long, first empty glume lanceolate, 

 1-nerved, 1.7-2 mm. long, second oval, acute wlien spread, 3- 

 nerved, 2.3 mm. long; floral glume sparingly webbed on tlie lower 

 third of the 3 nerves, oval, acute when spread, 2.5 mm. long; 

 lateral nerves evanescent one-third tlie way below the apes; palea 

 2 mm. long. Anthers oblong, 5-G mm. long. 



