384 TETRADYXAMIA BILIQUOSA 



1. 0. bhombotdf.a, 7)C Root tuberous ; stem erect, sub-simp|<> • 

 radical loaves cordate-orbicular, or oval, oji long petioles, lower stem* 

 leaves rhomboid-ovate, sinuate-dentate, on short petioles, upper ones 

 lance-oblong, sessile ; petals large. Beck, Bot. p. 30. 



C. rotundifolia. Hook. Am. !./>. 44. Not of Mx. Pureh, DC. & c . 

 Arabis rhomboidea. Pers. Sy?i. 2. /;. 204. Pursh, dm. 2. p. 437 

 Nutt. Gen. 2. p. 70. Bart. Phil. 2. />. 57. Ell. Sk.2. p. 149. BiveL 

 Host. p. 252. Fhvul. Cestr. p. 74. 



A. bulbosa. Jlfuhl. Cat ah p. 61. 

 *9l$o, A. tuberosa. Pens. I. c\ 



Raoxboid Cardamixi:. Vulgo — Spring Cress. 



Plant smooth. Root perennial, producing white tubers, mostly in small clusters 

 Warmly acrid. Stem 9 to 18 inches high, erect, or slightly decumbent at base, sin,.' 

 pie, or sparingly branched above, angular and striate. Radical leaves 3 fourths 

 of an inch to an inch and half long, generally rather oval, entire, or obtusely re- 

 pand, often cordate at base, petioles 2 to 4 or 6 inches long, proceeding from the 

 tubers ; loxoer stem-leaves 1 to 3 inches long, and 3 fourths of an inch to an inch 

 and half wide, ovate-oblong, or obscurely rhomboid, obtuse, remotely and obtusely 

 •inuate-dentate, sometimes almost hastatc-lobed at base,;W*o/e6' gradually shorter 

 as they ascend; ujyper leaves ovate-lanceolate, and lance-oblong, rather acute 

 with a few coarse teeth, sometimes entire, sessile. Racemes 2 to 4 or inches 

 long ; pedicels half an inch to near an inch long, spreading. Sepals with a white 

 margin. Petals white, obovate-cuneate, 3 to 4 times as long as the calyx. £//. 

 iques about an inch long, spreading, sublinear, acuminate. 



Hub. Springs, and swampy rivulets: frequent. Fl. April. Fr. May. 



2. C. noTrxniroLTA, Mx. Root fibrous; stem decumbent, branch- 

 ing; branches slender, flaccid, elongating; leaves orbicular, or broad- 

 oval, obtusely repand-dentatc, allpetiolate ; petals middle sized. Beck, 

 Bot. />. 30. Not of Bigeh 



RorXD-LKAVKI) CARDAMrXK. 



Plant smooth. Root perennial, of numerous long slender fibres. Stem o to H 

 or 15 inches Ion?, striate, decumbent, with numerous axillary branches ; branches 

 weak, spreading, becoming procumbent, and often radicating. Leaves 1 third of 

 an inch to 2 inches long, and nearly as wide as long, all nearly conformable, the 

 lower ones large, often with a pair of minute lobes on the petiole, the upper onei 

 gradually smaller to the extremities of the branches ; lower petioles 1 to 2 inches 

 long, dilated, nerved, gradually shorter as they ascend. Racemes 1 to 2 or 3 inches 

 long, sometimes proliferous at the summit ; pedicels half an inch to 3 quarters in 

 length, spreading. Petals white, or ochroleucous, cuneatc-obovate, about twice 

 as long as the calyx. Silirjues half an inch to 3 quarters in length, spreading 

 linear, with a slender acumination. 



Hab. Shaded springs and rivulets ; Brandy wine : not common. Fl May. F r . June 



Obs. This species is comparatively rare ; but it has been found in several pla- 

 CM within the County, since my Catalogue was published. Though long confounded 

 with the preceding, it is now admitted, I believe, by all who have seen cood spe- 

 aimens, to be quite distinct. Prof. Hooker has published excellent descriptions 

 ! ^r /. ac ' om P anied wilh P^tes, in the Botanical Miscellany. The C r*. 

 fundi/olia, Bigtl. is believed to be the C. belUdifolia, L. 



