34 GKAMLNKAI-: 



4. P. nemoralis L. Culms 20'-30' high, erect, giinple and glabrous : 

 jmnicle slender, 5^-S^ long, its branches erect or ascending, l'-3' long : 

 spikelets IV^ long, 2-4- flowered : flowering glumes cobwebby at base and 

 hairy on the mid and marginal nerves below the middle. — Sparingly 

 adventized in moist ground along the railroads at Sheflield and Courtney. 

 May-July. 



5. P. flava L. Meadow Grass. Culms 2°-3° tall, in clumps: sheaths 

 smooth : panicle open with spreading branches, 8'-15' long : spikelets 

 2-4-flowered, IV^ long, short-pedicelled : flowering glumes obscurely 

 5-nerved, the mid and marginal nerves hairy below. — In wet grounds. 

 Not common. Springy places at Burge Park. Maj'. 



6. P. pratensls L. Kentucky Blue grass. Culms 10'~3^° tall, 

 erect, from long running rootstocks : panicle 1^-8' long, usually pyram- 

 idal, its branches erect, ascending or spreading : spikelets 3-5 flowered, 

 short-pedicelled or nearly sessile, \Y^-2V^ long: flowering glume 5- 

 uerved, cobwebby at base and hairy below on the keel and margin. Very 

 •common in all kinds of situations throughout. April-June. 



7. P. trivialis L. Kough Meadow Grass. Culms l°-3° high: 

 sheaths and leaves very rough : panicle 4'-6' long : spikelets usually 2- 

 ilowered, \l" long : flowering glumes strongly 5-nerved, only the mid- 

 nerve hairy. — Sparingly adventized at Courtney. June-August. 



8. P. sylvestrls A. Gray. Wood Grass. Culms weak, l°-3° 

 high, erect : panicle A'-l' long, its branches ascending toreflexed: spike- 

 lets y-\Y^ long, 2-3-flowered : flowering glumes plainly 5-nerved, cob- 

 webby and persistent below. — Common in woods throughout. May- 

 June. 



9. P. "Wolfii Scribn. Culms tufted, 2°-2J°high : panicle 3'-4' long, 

 its branches ascending, rather few-flowered : spikelets 2''-3'^ long, 2-4- 

 flowered : flowering glumes cobwebby at base, the mid and marginal 

 nerves pubescent for three-fourths of their length. — Common in dry 

 woods in one locality on the Blue Kiver Bluffs opposite the mouth of 

 Brush Creek. April-May. 



48. PANICULARIA Fabr. Manna Grass. 

 Spikelets paniculate, terete or flattish, several-niany-flowered. Two 

 lower glumes empty, the flowering glumes rounded, 5-9-nerved, scarious 

 at the ape.x. Palets 2keeled. 



Spikelets V'-\V' long, oblong. 1. P. nervnta. 



Spikelets ()'' or more long, linear. 2. P.jluilans. 



1. P. nervata (Willd. ) Kuntze. Culms erect, 2°-3° high : panicle 

 5'-8' long, its branchesat first erect, then spreading, and (inally drooping : 

 spikelets 3-7-flowered, very readily breaking up at maturity. — Common 

 in wet places throughout, but especially in the nortliern part. May- 

 July. 



