Three nexo Plants of Central Ohio. 49 



We Jeft this interesting region near the end of July, returning 

 to New York by way of Raleigh, Richmond, &c. ; and found a 

 marked change in the vegetation immediately on crossing the 

 Blue Ridge. I cannot extend these remarks to the plants ob- 

 served in our homeward journey, except to mention that the 

 Schrankia of this part of the country, which extends to the east- 

 ern slope of the Blue Ridge, is the yS. angustata, Torr. 4" Gr, ; 

 at least we observed no other species. This is doubtless the ^S". 

 uncinata of DeCandolle ; but not, I think, of Willdenow. I may 

 here remark, that the reticulate-leaved species, {S. unci7iata, 

 Torr. (S^ Gr.) is the Leptoglottis of DeCandolle, {Mem. Legum.) 

 as I have ascertained from a fragment of the original specimen in 

 the rich herbarium of Mr. Webb, which that gentleman obli- 

 gingly sent me ; but I find no neutral flowers or sterile filaments 

 in the numerous specimens of this plant, from difi"erent localities, 

 which I have from time to time examined. 



Art. 11,— Account of three undescrihed Plants of Central Ohio ; 

 by Wm. S. Sullivant. 



1. Arabis PATENS (sp. ?iov. ) : erecta, pilis rigidiusculis simpli- 

 cibus furcatisve undique vestita, foliis radicalibus rosulatis petio- 

 latis, mediis oblongo-ovatis grosse dentatis auriculato-amplexicau- 

 libus, summis lineari-oblongis subintegris, pedicellis flore majus- 

 culo (albo) longioribus, siliquis patentibus sursum curvatis stylo 

 conspicuo rostellatis. 



Hab. Rocky banks of the Scioto River, near Columbus, Ohio. 



Obs. The far less numerous siliqucs, widely spreading and 

 with an upward curvature, and tipped with distinct somewhat 

 clavate styles, as well as the larger flowers, will readily distin- 

 guish this species from A. hirsuta, with which it has perhaps 

 been confounded. It has nothing of the strict habit of that spe- 

 cies. The septum of A. patens presents descending, rather 

 straight, and broken lines of tubuli, which anastomose and pro- 

 duce irregular oblong areolae, parallel with the septum. In A. 

 hirsuta the areolae are amorphous, on account of the very tortu- 

 ous, anastomosing lines of tubuli. The septum of A. Imvigata 

 has a straight central line, or raphe, extending throughout its 

 whole length, with reticulations like those of the last species. 



Vol. XLii, No. 1.— Oct.-Dec. 1841. 7 



