Botanique. URACHNE. 19 
11. 
Species Mühlenbergiana teste Hooker (FI. Bor. Am. 2. 1840. p. 236) 
valde differt a Piptathero nigro Torrey. 
Piptatherum nigrum Torrey! FL Am. 1. (1826) p. 79. 
Urachne (Oryzopsis) melanosperma Link Hort. Berol. 1. (1827) p. 94? 
«Urachnae leucospermae simillima, nec nisi colore seminis diversa» (Link: 
an igitur eadem ac U. asperifolia? 
In umbrosis, saxosis a Pensylvania usque ad Novam Angliam (Nut- 
tall); N. Eborac. pars occid. (Gray): in collibus Pensylvaniae pr. Lan- 
caster (Mühlbg ex Sm.). August. (Torrey) 2. 
IT. Eriocoma Nuttall 1818. Panicula ampla lucida. Flosculi seri- 
ceo-lanati, ovati. Lodic. sqq. 5. (1. e. 3, accessoriis 2). Antherae barba- 
tae. Stigmata ex apice flosculi exserta. — Incola Americae boreali -occi- 
dentalioris temperatae. 
Urachne lanata Trin. Act. Petrop. 183%. p. 126. Folüs convoluto-fili- 
formibus; paniculae amplae, effusae, tremulae radis geminis, plu- 
rifloris, elongatis, patentibus: -foseulo sericeo-lanato, glumis cau- 
dato-acuminatis # linealibus duplo breviore: arista glumis paullo 
longiore:; antherarum loculis apice barbatis. 
Stipa membranacea Pursh FI. Am. 2. (481%) p. 728. non Linne. Kunth 
Agr. syn. p. 186. Hooker F1. Bor. Anier. 2. p. 237. 
Stipa hymenoides RS. Syst. 2. (1817) p. 339. Mantiss. 2. p. 188. 
Eriocoma cuspidata Nuttall! gen. 1. (1818) p. #0. 
Milium cuspidatum Spreng. Syst. 1. (1825) p. 251. 
Ad litora graminosa fluvi Missouri (Pursh. Nuttall!'): Carlton House 
Fort (Hooker), versus «Rocky Mountains» ad fl. Platte (Torrey): «from 
the Arikaree village to the Northern Andes» (Nuttall}: in planitie ste- 
rih ad fl. Columbia à catarrhactis magnis usque ad fontes fl: Missouri 
(Douglas ex Hooker et in Hb. Soc. Hortic. Londin!). Jun. Julio: (Nutt.) 
+ 
