Dentaria. XIIT. CRUCIFERiE. 167 



6. A. DENTATA. Torr. & Gray. 



Plant somewhat scabrous ; radical lis. obovate, petiolate, unequally and 

 sharply dentate ; cauline ones oblong, amplexicaul ; pet. minute, spatulate, as 

 long as the sepals ; stig. subsessile ; silique short. — River banks. Western 

 States ! Stem slender, ascending, 1 — 2f high. Petals white, with a purplish 

 tinge, Siliques 1' in length. Apr. 



IG. CARDAMINE. 



Gr. KapSia, heart, Sajiacj^ to strengthen ; from its stomachic propcrtiea. 



Calyx a little spreading ; silique linear, with flat, veinless valves, 

 narrower than the dissepiment, and often opening elastically ; stigma 

 entire ; seeds not margined, with a slender funiculus, 0=. — Mostly %. 

 Fls white. 



1. C. HiRsuTA. (C. Pennsylvanica. Muhl.) Pennsylvanian Cardamine. 

 Lvs. pinnate or lyrately pinnatifid; l/ts. entire, or sparingly repand-den- 



ticulate, those of the radical leaves oval-oblong, of the cauline linear-oblong, 

 the terminal one longest, about 3-lobed ; pet. oblong-cuneate ; siliques erect, 

 with a very short style. — or "Ij. A variable plant common in wet places 

 throughout the U. S. Stem 8 — IG' high, mostly smooth. Leaflets 2 — 5 pairs, 

 4 — 12" long, smoothish. Fls. small. Siliques about 1' long, 12 — 18 seeded, Jn. 



2. C. ViRGiNiCA. (C. hirsuta, /?. Hook.) Virginian Cardamine. 



Lvs. IjTately pinnate; Ifls. with a single tooth on one or both sides; pet. 

 nearly twice as long as the calyx ; }-ac. strictly erect; stig. sessile ; siliquelong, 

 incurved, erect. — (g) A small and delicate species, much resembling the last, 

 but probably distinct. Found on dry hill-sides, Vt. Ct. to Ky. and Mo. Stem 

 4 — 8' high, slender, leafy. Leaflets 2 — 4 pairs with a trilobate odd one, oval, 

 1 — 2" in length, those of the upper leaves 3 — 5" long, but very narrow. Petals 

 small. Siliques filiform, 1' long. Jn. 



3. C. PRATENsis. Field Cardamine. 



St. erect or decumbent, simple ; lvs. pinnately 7 — 15-foliate ; l/ts. petio- 

 late, subentire, lower ones suborbicular, upper linear-lanceolate ; sty. distinct. — 

 % Swamps, N. Y. to Arctic Am. Whole plant smooth. Stem round, striate, 

 10 — 16' high. Leaves few, Ij — 2' long including the petiole. Leaflets of the 

 root-leaves 1—3" diam., of the cauline 3 — 6" by f". Flowers large, few, in a 

 terminal raceme. Petals white or rose-color, Siliques nearly 1' in length, 

 erect. Apr. May. 



4. C. ROTL'N'DiFOLiA. Michx. (C. rhomboidca. DC. Arabis, Pers. Nutt.) 

 Glabrous or somewhat hairy; lvs. entire or repand-toothed, radical ones 



orbicular-ovate, on long petioles, cauline oval or oblong-lanceolate, petiolate 

 below, .sessile above, dentate. — % Another variable species with rather large, 

 white or reddish flowers. Stems 6 — 12' high, angular or striate, mostly erect. 

 Leaves of root 10 — 18" diam., on petioles 2—4' long. Racemes about 3' long, 

 12 — 20-flowered. Petals 2 — i times as long as the calyx. Siliques spreading, 

 G — 12" long. Apr. May. 



a. T. & G. Rl. mostly tuberiferous ; st. erect; lower stem lvs. rhomboid-oval ; 

 pet. large. — Wet meadows, Conn. Vt. Dr. Roblnns. 



0. T. &■. G. /?/. mostly fibrous; .«?/. decumbent, branching; lvs. all petio- 

 late; pet. smaller, purplish. — Shaded springs and rivulets, N. Y. 

 4. C. BRi.LiDiKOMA. (C, rotundifolia. liic. not Michx.) 

 Lvs. f^moolh, radical ones orbicular-ovate, nearly entire, petiolate; cau- 

 line ojjcs entire or 3-lobcd ; silit/ues erect. — A minute species on the summits of 

 the White Mts. Ahcl Starrs! &c., al.so Arc. Am. to Calif. Stem IJ — 3' high. 

 Leaves mostly radical, broadly oval or ovate, \' long, on petioles as long as 

 the stems. Fascicles corymbose, each of 3 or 4 white flowers. Petals oval, 

 obtuse, about twice as long as the calyx. Jl. 



17. DENTARIA. 



Lat. dcm, a tooth ; from thf toothlikc projcotlonn of the rhixoma. 



Sepals converging ; silique lanceolate, with flat, veinlesfl, revolute 



