GRAMINE^. (gPASS FAMILY.) 61^ 



eels spreading in flower, afterwards erect. Spikelets 2 J" - 3" long. Awn of 

 the palet either obsolete or manifest. 



Var. p^udula. Gray. Panicle loose and more slender, the branches nearly 

 capillary and drooping in flower ; pedicels very rough ; glumes and palets thin- 

 ner, the former less unequal ; spikelets 1 J" - 2" long ; upper palet obtuse. (C. 

 pendula, Tnn, C. latifolia, Oneeb. C. expansa, Link. Bly'ttia suavfeolens, 

 Fries.) ^r- Peep damp woods, N. New England to Lake Superior and northward, 

 and on mountains southward, -r^ A slender variety of the last, as is shown by 

 intermediate specin>en3, always monandrous. (Eu.) 



11. MUHLENBEBGIA, Scjireber. Dbo, seed G. (PI. 8.) 



Spikelets 1-flowered, in contracted or rarely in open panicles. Glumes mostly 

 acute or bristle-pointed, persistent ; the lower rather smaller or minute. Flower 

 yery shojrt-stalked or sessile in the glumes ; the palets usually minutely bearded 

 at the b?£e, herbaceous, decjduous with the enclosed grjiin, often equal ; the 

 lower 3-nervcd, mucronate or awned at the apex. Stamens 3. (Dedicated to 

 the Beo. Dr. Hmry Muhlenberg, a distinguished American botanist of the early 

 part of this century.) 



§ 1. MUHLENBEKGIA proper. Panicles contracted or glomerate, terminal 

 and pxilhry : perennials {in our species) with branching rigid culms, from scaly 

 creeping rootstocks : leaves short and narrow. 

 * Lower palet barely mucronate or sharp-pointed. (Sp. of Cinna, Kunth, Trin.) 



1. M, SObolifera, Trin. Culmsascending(l°-2°high),rarelybranching; 

 the simple contracted panicle very slender or filiform ; glumes barely pointed, almost 

 equal, one third shorter than the equal palets ; lower palet abruptly short-mucronate. 

 (Agrostis sobolifera, Muhl.) — Open rocky woods, Mass. to Michigan, Illinois, 

 and southward. Ajjg. — Spikelets less than 1" long. 



2. M. glomerMa, Trin. Culmsupright (I°-3°high),sparinglybranched 

 or simple ; panicle oblong-linear, contracted into an interrupted glomerate spike, long- 

 peduncled, the branches sessile ; glumes owned, nearly equal, and (with the 

 bristle-like awn) about twice the length of the unequal very acute palets. (Agr. 

 racemosa, Michx. A. setbsa, Muhl. Polypbgon racemosus, Nutt.) — Bogs: 

 common, especially northward. Aug. — Panicle 2' -3' long. 



3. M. Mexic&na, Trin. Culms ascending, much branched (2°- 3° high); 

 panicles lateral and terminal, often included at the base, contracted, the branches 

 densely spiked-clustered, linear (green and purplish) ; glumes awnless, sharp-pointed, 

 unequal, the upper about the length of the very acute lower palet. (Agr. 

 Mexicana, L. A. lateriflora, Michx.) — Varies with more slender panicles (A. 

 filifdrmis, JI/mW.) — Low grounds : common. Aug. 



• » L^wer pale( bristle-awnedfrom the tip : flowers short'pedicdled. 

 ' 4. M. Bylv&tica, Torr. & Gr. Culms ascending, much branched and 

 diffusely spreading (Z°-i° long); contracted panicles densely many flowered ; 

 glumes almost equal, bristle-pointed, nearly as long as the lower palet, which bears an 

 awn twiee or thrice the length of the spikelet. (Agr. diffusa, MM.) — Low or 

 rocky woods : common. Aug., Sept — r In aspect between No. 3 and No. 5. 



