PANIC K.K. 137 



So far us observed tliis seems to u f-ood si)e(!ies. 



Soiitlieni 'l\'\as. 



5!t. P. microcarpon Mulil. (irmu. Ill (1817). 



All erect stout iiereiiiiial ; culm smootii. sometimes hairy at 

 the nodes, perhii|)s s|iariii<,dy hniiiehed. :5()-'.t() em. Iii<,'h. Sheatlis 

 as loiif^ as the internotles; hlaties ohlon<f-laiu('olate from a narrowed 

 cordate base, smootli exeept the rougli marjjins and eiliate base, 

 !)-13-iierve<l, 10-18 em. lon^, "Z-'-i cm. wide, usually a tuft of thiek 

 ovate leaves near the grouml. the apex much the sha]te of the leaves 

 of /*. clandcsfhiiiiH. I'aniele mueh exserted on a slender |)edunele, 

 oblong or oval, 8-18 cm. long. Si)ikelets often |)urple. smooth or 

 nearly so, very numerous on very slender pedicels, obovoid or oval. 

 1.4 mm. long: lirst glume less than one-third as long as the sj)ike- 

 let; second and floral glume of the neuter floret similar. 7-nerved. 

 the palea for the latter very small, liyaline. tlie fertile floret smooth, 

 the sliajie of a hemisj)here slightly con, pressed. 



Specimens from the U. S. Dept. Agrimil., no locality; Dis- 

 rri<'t of Columbia. McCnrfJij/. 



Wet ground. Massachusetts to Michigan and Texas. 



Var. sphserocarpon (Ell.). P. sp/icrrocrn'/mii Ell. Hot. S. C. & 

 fJa. 1 : 1 ■.*.') (I81T). Plant shorter, more slender; blailes (5 cm. long, 

 8 mm. wide; sheaths shorter than the iuternodes. which are often 

 puliescent; panicle 5-7 cm. long; spikelets smooth or shortly pubes- 

 cent. 



District ot' Columbia, U. S. Dept. Agricnl. from Dr. TV/wy/. 



Same range as the s})ecies. 



60. P. Chapmani Vasey. Bull. Torr. Club, 11:01 (188+). P. 

 tennicnhmm Chapm. Fl. S. States. 5:2 (I SCO), not Meyer. 



Culms tufted, erect, slender, mostly simple. Sheaths ciliatc on 

 the margins: lignle a eiliate ring; blades of sterile shoots lirm. 

 mostly involute, usually smooth l)elow. scabrous above, 20-30 cm. 

 lomr, 2—1 mm. wide, those of the culms shorter or about the lenjrtli 

 of the interuodes. Panicle slender, simple, racemose. 15-30 cm. 

 long composed of 8-10 appressed. sessile spikes, which are distant 

 below and a])])roximate above, 1-3 cm. long; rachis triquetrous, 

 scabrous, flexuose, terminated by a short bristle. Spikelets oval. 



