BotauiqiK. U R A C JI N E. 19 



Species Miihlenbergiana teste Ilookcr (Fl. Bor. Am. 2. 18^0. p. 236) 

 valde differt a Piptathero nigro Torrey. 



Viptathenim nigriim Torfey! Fl. Am. 1. (1826) p. 79. 



Urac/me [Orjzopsis) melanosperma Link Ilort. Bcrol. 1. (1827) p. 9V? 

 '<Ui'aclinae leucospermae slniillima, nec nisi colore seniinis diversa» (Link); 

 an igitur eadcm ac U. asperifolla? 



In umbrosis, saxosis a Pensylvania usque ad Novam Angliam (Nut- 

 tall); N. Eborac. pars occid. (Grayl); in colllbus Pensylvaniae pr. Lan- 

 caster (Miihlbg ex Sm.). August. (Torrey) l^. 



S- III. Eriocoma Nuttall 1818. Panlcula ampla luclda. Flosculi seri- 

 eeo-lanati, ovati. Lodic. sqq. 5. (i. e. 3, accessoriis 2). Anthcrae barba- 

 tae. Stigmata ex apice flosculi exserta. — Incola Americae borcali-occi- 

 dentalloris tempcratac. 

 11. Urachne lanata Trin. Act. Petrop. 1834. p. 126. Foliis convoluto-tili- 

 formibus; paniculac amplae, eflusae, tremulae radlis geminis, plu- 

 rifloris, elongatis, patentlbus; floscido sericeo-lanato , glumis cau- 

 dato-aciuninatis k lincallbus duplo breviore ; arista glumis paullo 

 longiore; antherarum loculls aplce barbatis. 

 Stipa membranacea Pursh FI. Am. 2. (1814.) p. 728. non Linne. Kunth 

 Agr. syn. p. 186. Ilookcr FI. Bor. Amer. 2. p. 237. 



Stipa hjmenoides R.S. Syst. 2. (1817) p. 339. Mantiss. 2. p. 188. 

 Eriocoma cuspidata Nuttall! gcn. 1. (1818) p. 40. 

 Milium cuspidalum Spreng. Syst. 1. (1825) p. 251. 

 Ad Iltora graniinosa fluvil Missouri (Pursh. Nuttall!); Carlton Housc 

 Fort (Hookcr), versus <(llocky Mountains» ad fl. Platte (Torrcy); «froni 

 the Arikaree village to the Northern Andcs» (Nuttall); in planitic ste- 

 rili ad fl. Columbia a catarrhactis magnis usque ad fontcs fl. Missouri 

 (Douglas ex Ilookcr et in Hb. Soc. Ilortic. Londini). Jun. Julio. (Nutt.) 



