144 PlantcE Lindheimeriance. 



of S. obtusifolius nor of S. maculatus, with which last espe- 

 cially our plant should be critically compared. But Dr. Tor- 

 rey informs me that these species want the bracts, so uncom- 

 mon in CrucifercE, and which so conspicuously distinguish S. 

 bracteatus. 



324. Erysimum Arkansanum, Nutt. in Torr. fy Gr. Fl. 1. 

 p. 94; Gray, Gen. 111. 1. t. 63. Wooded, rocky banks, &c, 

 Comale Spring, and on the Guadaloupe. March, April. — A 

 showy species, with large, deep, golden yellow, and faintly 

 fragrant flowers. It was found on the Rio Grande by Mr. 

 Wright. 



325. Vesicaria Engelmanii (Gray, Gen. Am. Bor.-Or. 111. 

 1. p. 162, t. 70) : perennis, pube lepidoto-stellata argentata; 

 caulibus e caudice sublignoso plurimis simplicibus erectis su- 

 perne parce foliatis ; foliis inferioribus spathulatis seu oblance- 

 olatis rariter repando vel sinuato-dentatis in petiolum attenu- 

 atis, superioribus sublinearibus integerrimis ; racemo etiam 

 fructifero brevi saspius corymbiformi ; silicula globosa glaber- 

 rima breviter stipitata 5-12-sperma (loculis 8-ovulatis) 

 stylo pergracili breviora ; seminibus submarginatis ; funiculis 

 septo longe adnatis. — Pebbly shore of the Guadaloupe, New 

 Braunfels. May. Chiefly with mature fruit. (The same 

 species, apparently, with elliptical and entire radical leaves, 

 was found on the Upper Canadian, by Mr. Gordon.) From 

 Lindheimer's seeds, this handsome and very distinct perennial 

 species is in cultivation in the Cambridge Botanic Garden. 

 It makes a strong, deep root. The clustered, simple stems 

 rise to the height of a span or a foot, are clothed, like the 

 foliage, with a silvery pubescence composed of dense and 

 closely appressed stellar tufts, and are terminated by a short 

 and dense, usually umbelliform, raceme of golden yellow flow- 

 ers, which are fully as large as those of V. grandiflora, the 

 petals being half an inch long. Lower leaves two to three 

 inches in length. The style is one third of an inch in length. 

 I should have adopted Dr. Engelmann's or Lindheimer's 

 name of V. umbellata, under which the specimens were sent, 



