TETRADYNAMIA SILIQUOSA 385 



3. C. hirsuti, L. Leaves pseudo-pinnate ; leaflets of the radical 

 leaves petiolate, mostly rounded, of the cauline ones subpetiolatc, lance- 

 oblong, dentate, or entire ; petals small, cuneate-oblong ; siliques erect. 



Beck, Bot.p. 31. 



C. pennsylvanica. Pursh, Am. 2. p.MO. Xntt. Gen. 2./;. 67. Bart. 



Phil. 2. p. 218. Ell. Sk. 2. p. 144. Bigel. Bost. p. 253. Floral. 



Cestr.p. 75. Also, Willd. Sp. 3. p. 486. Pers. Syn.2.p. 196. Muhl. 



Catal. p. 60. D C. Prodr. 1. p. 151. Torr. Comp. p. 249. JJndl. 



Ency. p. 542. Eat. Man. p. 67. 



C. virginica. Mx. Am. 2. p. 29, Also, Willd? Pursh, Vc. not 



of L. {vide DC. Syst. 2.p. 259.). 



Also? C. sylvatica, andC. parviflora. DC. Prodr. I. p. 152. 



Hirsute Cardamiwe. Vulga— Water Cress. 



Root annual 1 fibrous. Stem 3 or 4 to 12 or 18 inches high, erect, often flexuose, 

 striate-angled, more or less hairy, sometimes nearly glabrous, branching, and 

 often several from the same root. Leaves 1 to 3 or 4 inches long, petiolate, pin- 

 nately dissected, mostly smooth ; the leaflets of the radical leaves nearly orbicu- 

 lar, dentate-angular, or sparingly and obscurely denticulate, shortly mucronatcat 

 apex, narrowed to a short slender petiole at base ; leqflets of the stem-leaves vary- 

 ing from oval to lance-oblong and linear, dentate, or entire, narrowed at base, 

 subsessile, the terminal leaflet or lobe larger, obovate, sinuate-dentate, or trifid. 

 Racemes 2 to 4 or 6 inches long ; pedicels 1 eighth to near half an inch long, 

 rather erect. Petals white, narrow, nearly twice as long as the calyx, but rather 

 inconspicuous. Siliques about an inch long, erect, linear, slender, compressed. 

 Seeds compressed, oval, with one groove on each side, appearing as if doubled 

 (cotyledons accumbent), pale reddish brown. 



Hob. Springs, and along swampy rivulets: frequent. Fl. May. Fr. June. 



Obs. This is a variable plant, both in size and appearance, and with us is gen- 

 erally much smoother than in my European specimens: But I incline strongly 

 to the opinion of Prof. Hooker, and Dr. Beck, that the Synonyms* quoted above, 

 all refer to mere varieties of this species. The C. virginica seems to be a slender 

 starved variety, commonly growing in dry upland situations. The leaves of young 

 luxuriant specimens afford a pleasant Cress, in the spring of the year. Four or 

 five additional species are enumerated in the U. States. 



318. DENTARIA. L. Mitt. Gen. 557. 

 [Latin, Dens, dentis, a tooth ; from the tooth-like tubers of the root.] 



Calyx equal at base, erect. Petals unguiculate, the border obovate . 

 Filaments without teeth. Silique compressed, lanceolate, with a lon# 

 acumination ; valves flat, nerveless, often opening elastically. Seeds 

 in a single series, ovate, not margined ; funiculus dilated ; cotyledons 

 accumbent, thickish. 



1. D. lacixiata, Muhl. Leaves in threes, subverticillate, deeply 3- 

 parted, on short petioles ; segments lance-linear, coarsely incised-ser- 

 ra'e, or laciniate. Beck, Bot. p. 28. Icon, Bart. Am. 3. tab. 72. 

 D. concatenata, Mx. Am. 2. p. 30. Pers. Syn. 2. p. 194. 

 Laciniate Dentaria. Vulgd — Tooth-wort. 



Root (rhizoma?) perennial, fibrous and moniliform, or bearing horizontal 

 whitish ovoid-oblong tubers (usually 2 or 3, sometimes more) half an inch to an 

 inch in length, tapering at each end and connected by coarse fibres. Stem 6 to 1 2 



33 



