92 TRIANDRIA. DIGYNIA. polypogon. 



the calyx ; the inferior valve terminatin,^ in a bristle. 

 Desfont. Atlant, I. p. 67. Nutt. Gen. I. p. 50. 

 Roem. 8f Schult. Gen. 223. P. de Beauv. 

 Jgrost, t. VI. f. 8. Trin. Jgro.st. 16? Species of 

 Agrostis Ziin. &c. Panicle spiked. 



P, racemosus J^'ntt.: panicle dense, conglomerated^ 

 interrupted; bristles of the calyx scabrous; corolla unarmed, 

 hairy at the base; culm branched. J^utt. Gen. I. p. 51. 

 V. glomeraius IV i II d. Enuin. h. Berol. \. p.Bl. Roem. <Jr 

 Schult. U. Tp. 326, V. setusus Spreng. Mant 1. p. 31. 

 Roem, <$/• Schult. I.e. Agrostis rflrcemoso Mich. FL 

 I, p. 53. Pursh FL 1. p. 65. A. setosa M u h I. Gram. 

 p. 65. 'YKicnocHLO K glomerala ci calycina Trin. 



Root perennial. Culm erect, compressed, smooth, with appressed 

 branches. Leaves subdistichous, 3 — 5 inches long, erect, ra- 

 ther rigid, flat, scabrous and somewhat glaucous. Sheaths 

 smooth, striate, closed. Stifiule scarcely apparent. Panicle 

 terminal, about 2 mches long, many-fl(;wered, interrupted be- 

 low. Glumes of the ratyx linear, terminating in scabroys 

 bristles twice the length ol the corolla. Corolla nearly equal ; 

 th^ inferior valve lanceolate, 3-iierved, hairy on the lower part 

 and at the base, mucronate ; superior valve 3 nerved, hairy only 

 at the base. Stamens 3 ; anthers yellow. Styles 2 ; stigmas 

 puiple. <Sffrf oblong-cylindrical. 



Hab. In bog-meadows August — -September. Common in the 

 Hackensack meadov»s, New-Joisey. A native also of the 

 banks of ihe Missiisippi aiid of the Missouri. 



The plant here described does not agree precisely with the 

 generic character of 1'olypogon, the extcrjor valve of the co- 

 rolla being awnless ; biit, according XoN'uttall, the awn is 

 often wanting. I have retamed the specific name of Mi c haux 

 according to \[\^ established rule oi Linn tcus. 



12. TRICHOCHLOA. Dc Candolle. 



Calyx 2-valved, 1-flovvered; glumes very minyte. 

 Corolla much larger than the calyx, 2-valyed, naked at 

 the base ; interior valve convolute at the base, termi- 

 nating in a long awn not articulated. f De Cand. Cat. 



■j- I he genus InicHocHLOA is very diftlrently characteriztd by Trinius 

 in his new Agioslographia. The following is his descnplion :— " Panicula 

 contrc'Cta, angustaia. Cat. longitudine vuria, plerunque persistens. Cor. 

 callo pilifero nisidens ips;.que inferne pilis adspersa, acuminata 1. rostrate, 

 setigera.^ Xorf (nect.) squamae colL.tcrales. .S7am. 1— 3. iSemera oblongnm, 

 tectum" Trin 1. c 41. He divides jt ir.td luo seciions. 1 GUitnis 

 ovatis, corolla multr. brevioribus- To this is referred the Aghostis ieniirjiora 

 Will d., And A. sobolifera Muhl. 2. Gtitmis ungnstatis acummatis, lornri- 

 tudine vuria,- whicli cont.ms \. 7n^icu7ia L., A-Jilifonnis Willd.y and 

 PoLYf OGON glomeratus W ill d. 



