120 Botany of Illinois and Missouri, 



Pentstemon Nuttallii.* 



P. glaberrima ; foliis coriaceis, ovato-lanceolatis, denticu- 

 latis, subamplexicaulibus ; floribus paniculatis ; calycis folio- 

 lis ovatis acuminatis ; filamento sterili apice barbato ; anthe- 

 ris glabris. 



Stem two to three feet high, round, very smooth, almost 

 polished, stifly erect, simple. Leaves three to five inches 

 long, varying from ovate to lanceolate, acuminate, coriaceous 

 somewhat glaucous, subclasping. Flowers panicled ; pedun- 

 cles opposite, three to five flowered. Sterile filament densely 

 bearded on the under side about half its length. Anthers 

 smooth, as in P. pubescens. Leafets of the calyx ovate or 

 oval, with a long acuminate point. Distinguished from P. 

 erianthera of Nuttall, by its smooth anthers. 



TETRADYNAMIA SILICULOSA. 



Draba caroliniana. Walt. 

 Hab. Sides of mounds near St. Louis — May. 



Draba arabisans. Mich. 

 Obs. Stem three to four inches high, leafy. Leaves lan- 

 ceolate-ovate, sparingly dentate. 



Hab. In similar situations with the last. 



Capsella bursa-pastoris. De Cand. 

 Hab. On the prairies in Illinois and Missouri, common — 

 April. 



Lepidium virginicum. Lin. 

 Hab. Mounds near St. Louis — June. 



TETRADYNAMIA SILIQ.UOSA. 



Dentaria laciniata. Lin. 

 Hab. Wet prairies on the Illinois, near Fort Clark — April. 



Cardamine virginica. Lin. 

 Hab. Banks of small streams near St. Louis. 



Sisymbrium canescens. Nutt. 

 Hab. Banks of the Mississippi, at St. Louis. Two other 

 plants apparently belonging to this genus, I am unable to de- 

 termine for the want of perfect specimens. 



Arabis rhomboidea. Pers. 

 Arabis falcata. Mich. 

 Hab. Both found on the rocky banks of the Mississippi. 



