Plante Lindheimeriane. * 175 
A. nana, Nutt., Bot. Mag., and A. levigata, Nutt. from A. fru- 
ticosa. The A. Romeriana, Scheele in Linnea, 21. p. 461, 
is doubtless a form of A. fruticosa or of A. paniculata. 
375. Datea LaxirLora, Pursh. Fl. 2. p. 741; Torr. & 
Gray, Fl. 1. p. 307. D. penicillata, Moric. Pl. Nouv. Amer. 
t.45. Dry and rocky prairies, between the Rio Colorado 
and Guadaloupe. June, in flower. September, in fruit. 
+ D. rogonarnera, Gray, Pl. Fendl. p. 31. On the 
Liano. October.—Stems a span high, numerous, from 
a thickish, apparently perennial root. Vexillum violet-pur- 
ple. 
+ D. aurea, Nutt. Gen. 2. p. 101. Dry prairies, Upper 
Guadaloupe. June. 
+ D. nana; Torr. in Gray, Pl. Fendl. p. 31. Post-Oak- 
openings, on the Pierdenales. June. Also gathered by Mr. 
Wright on the Rio Grande, and by Mr. Gordon on the Ar- 
kansas. 
376. D. rrutescens (sp. nov.): glaberrima; caulibus lig- 
nescentibus ramosis glandulis tuberculiformibus raris obsitis ; 
foliolis 6—8-jugis glaucescenti-eruginosis obovatis retusis 
obcordatisve manifeste petiolulatis subtus (rachique in foliis 
summis submarginata) grosse glandulosis; spicis paniculatis 
brevibus paucifloris ; bracteis coriaceis ovatis muticis glandu- 
losis calycem vix equantibus caducis; tubo calycis sessili 
glabro glandulis magnis cerinis ornato, dentibus brevibus tri- 
angulato-subulatis margine villosis; corolla violacea, carina 
maxima vexillo plus duplo longiore. — Rocky hills, and high 
plains, along the margin of thickets, on the Guadaloupe, 
Sabinas, and Pierdenales. July, August. (Western Texas, 
and on the Rio Grande, Mr. Charles Wright. Monterey, 
N. Mexico, Dr. Edwards in Herb. Torr.) This is a shrubby 
species, a foot or two in height, and totally distinct from D. 
citriodora, for which I at first mistook it. ‘The flowers are 
more like those of D. nutans, but they are much fewer, 
sessile, the calyx remarkably glandular; the leaflets are of 
a different form, not at all crenate; and there is a gland, 
