New or rare Plants of the State of New York. 223 



CRUCIFERiE. 



5. Nasturtium natans, De Cand. Syst.U.p. 198; Prodr. 

 I. p. 139. De Less. Ic. 11. tab. 15. 



/5. Americanum; petalis calyce duplo longioribus ; siliculis 

 obovatis. N. natans, Hook. Fl. Bar. Am. I. p. 39. BecJc. Bot. 

 Northern and Middle States, p. 32. 



Hab. Oneida Lake, where it is very abundant, in water 

 2 — 5 feet deep. In the St. Lawrence river, near Ogdensburgh, 

 Dr. I. B. Crawe. Flowers in July. 



Obs. This plant, which I observed at the first mentioned 

 locality several years since, differs in some respects from the 

 Siberian N. natans, as described by De Candolle and figured 

 by De Lessert. In our specimens the flowers are about twice 

 as large as those of N. amjjhibium, the petals are j^^^re white in 

 the living plant, oblo?ig, and twice the length of the calyx, the 

 mature silicles obovate or obovate-oblong, more than 2 lines in 

 length; but in all other respects they agree minutely with De 

 Candolle's detailed description and De Lessert's figure. The 

 submersed leaves separate with great ease at their articulation 

 with the stem, so that perfect specimens are not readily obtained. 

 Although a rare plant, its geographical range is quite extensive, 

 as Dr. Ingalls has recently found it at New Orleans. 



6. Draba incana, Linn. Sp. PI. p. 897. Hook. Fl. Bor. 

 Am. I. p. 54. D. contorta, Ehrh. De Cand. Sijst. II. p. 348. 

 Prodr. I. p. 170. D. confusa, Ehrh. De Cand. I. c. Hook. 

 Fl. Bor. Am. I. c. 



(3. GLABRiuscuLA ; laeviter substellato-pubescens ; foliis 

 radicalibus spathulato-lanceolatis, caulinis oblongis, repando- 

 dentatis ; siUculis oblongo-linearibus. D. glabella, Pursh. FL 

 I. p. 344 ? Hook. Fl. Bor. Am. I. p. 54 ? 



"Whole plant covered with a minute, branched pubescence, but not 

 hoary. Root perennial ! Stems many from the same root, simple or 

 a little branching from the base. Radical leaves numerous and 

 crowded, forming a roseolate tuft, oblong or lanceolate spathulate, 

 much attenuated at the base, sparingly dentate. Caulinc leaves oblong 

 Vol. III. 29 



