224 New or rare Plants of the Sjatc of New York. 



or oblong-lanceolate, sub-araplexicaul, acute, sparsely and repandly 

 dentate ; those on the young branches somewhat entire. Flowers in 

 a short, somewhat compact, simple (or sometimes branching) raceme. 

 Lower pedicels nearly as long as the mature silicle ; the upper ones 

 shorter. Sepals ovate, obtuse, with white margins. Petals white, 

 broad-ovate, entire, a little more than twice the length of the sepals. 

 Silicles oblong, linear, contorted, 6 — 8 lines long when mature, gla- 

 brous, crowned with a distinct but very short style. Seeds 10 — 15 in 

 each cell. 



Obs. This plant, which I refer to D. incana with some he- 

 sitation, will perhaps prove to be a distinct species. It much 

 resembles D. confusa of Hooker, (specimens of which I have 

 examined in the herbarium of Prof. Torrey,) and which, as 

 Prof. Hooker observes, insensibly passes into I). incana. His 

 specimens, however, differ from ours in having shorter styles, 

 a much more dense pubescence and sparingly dentate, or sub- 

 entire leaves, which are somewhat ovate : the radical leaves 

 are not, as in our plant, much attenuated at the base, so as to 

 appear petiolate. In our plant also the silicle is glabrous, and 

 rather linear than oblong. I suspect that the character of D. 

 glabella, Pursh, is drawn from dwarf specimens of this plant. 

 It also agrees perfectly with the D. glabella of Hooker's Flora, 

 except in the number of cauline leaves, and in the calyx, winch 

 in that species is said to be very glabrous. Prof. Hooker, 

 however, has not had an opportunity of examining the fruit. 



The habit of our plant is precisely that of Drabra ramosis- 

 sima of Desvaux (D. arabizans, Dursh, non Michx. D. den- 

 tata, Hooh Sf Am. in Hooker's Journal of Botany. Alyssum 

 dentation, Nutt.) ; a species which is well characterized by its 

 lanceolate, deeply dentate leaves, its compound racemose inflo- 

 rescence, its shorter and pubescent silicles, and longer style. 



RHAMNEJ&. 



7. Ceanothtjs ovalis, Bigeloiv, Fl. Bost, ed. 2. p. 92. 

 C intermedius, Hook, Fl. Dor. Am. I. p. 124, non Pursh. 

 On rocks and barren grounds, Watertown, Jefferson county. 



