124 l'.\NICA("K.K. 



several spiki'lots from livi' dilVi'iciil plants taken from dilVoront lo(!ali- 

 ties. A lar^t' iiiimlu'r of forms could Ite sclectcil. I'laiits from 

 Colorado have heeii st'eii in wliiiih there were "^ r (lowers and some 

 empty <;lumes to the spikelel, all staminate. 



A tall jijniss, (iulms and leaves too toiiyh t(» make tlii' hest of I'et'd. 



l-'lorida. Ciir/iKs :!(i()li; New Jersey, Srrilnicr for l". S. I)(>pi. 

 Ai^rieid. idl ; Colorado, ('(tssiiit/; Mexico, Pidmrr olO; Florida, 

 Siiiipsuii for Nat. Mns. Ui^^); Arizona. Tokiiicii \i^\ \ Illinois, Unil 

 for M. A. ('. 11: Michi.iian, IlirLs for M. A. V. lA. 



("oiineeticnt. Northern Indiana. Kansas. Missouri. 



Mexico to l"'lorida. and west to the Ifocky Mountains. 



\V.\. P. capillarioides \'asey. Contrih. V. S. Merit. l:,".l (ISKO). 



A rather slender perennial. ."JO ('»() cm. hiyh. with much the 

 uspoct of /'. capillitrc. Shi'aths pid»escent. aliout the length of tli(«' 

 internodes; li,i>ule a ciliate rim; ; Itlades Hat. nearly smooth, 10 ".',"> 

 em. lonji', S-iii mm. wide. I'anicles at length harely exserli'd, 

 mostly terminal, pyi'amidal. S -1;") IJO cm. lonif. r.'-".M) 10 cm. 

 broad, rays often in |)airs, nn»stly sinj,de. rather stilT with pnhesccnt 

 ^danils in the axils, hranehes diverifiiii;-. sti'aijiht or slightly llexnose. 

 ilower- hearing mainly above the nu(ldk^ Spikelets siuiile, or :» 

 near the ends of the branches, ifreon or purple, linear-lanceolate, 

 5-»» mm. lo"i;, first jflnme ovate, 'Lit mm. lony, 5-nerved, second 

 and third iintrr. scarcely atMite. i l-l.'J-iu'rved. fourth or palea of 

 the sterile s, Kielet ovate, "^ mm. lony-; lloret mottled with brown, 

 oval. 1.8 mm. lonjr. 



Texas, /iiir/>/n/, Nctdlji 'M), Miss Cro/f. 



.14. P. amarum Kll. Hot. S. ('. and (ia. 1 : I'.M (ISK). 



A robust glabrous creeping,' perennial, ;{0-!)() cm. liiyh. Leaf- 

 blades '-itMO (iin. lon<;\ 7 -I'i mm. wide, glaucous, lirm. often invo- 

 lute, with lon<j:. slentler points, some of them rea<'hin,if above the 

 panicle. I*anic,le lO-IJO cm. long, racemose, sim|)le, smooth with 

 the appressiul rays soniet'imes included. Spikelets ovate-lanceolate, 

 about ■> mm. lonj;^, lirst j^lume (.vatc, acute. I mm. loiii,'. li-m-rvcil. 

 second lon<;er, 7-nerved : lloral {^lume of the sterile lloret like the 

 latter, oidy r)-nervoil, its palea as lonjjf; fertile lloret oval, ;{.5 mm. 

 lonL"". 



