84 CRUCIFER^. Cardamine. 



from C. rhomboidea, 7?C, and that the diffcronce in the appearance of the 

 two plants depends on the place of growth. The former grows in cold se- 

 questered springy places, where it does not readily bear fruit early in the sea- 

 son; and as summer advances, it becomes slender, procumbent, and loses its 

 tubers at the base of the stem. Sir WilUam J. Hooker has accurately figur- 

 ed and described both forms of the plant ; but having seen the two pass into 

 each other, we are obliged to dissent from our friends Avho consider ih«m dis- 

 tinct. The var. y. takes the place of the ordinary form in Canada, the wes- 

 tern part of the State of New York, and the Western States. 



2. C. spathulata (Michx.) : radical leaves petioled, spatulate, entire, hir- 

 sute with a trifurcate pubescence ; cauline ones sessile, ovate or linear-oblong ; 

 siliques spreading ; stems decumhent— Michx.! ft. 2. p. 29 ; DC. syst. 2. p. 

 247 ; Ell. sk. 2. p. 143. 



High mountams of Carolina, Michaux .'—[£) Stems 6-8 mches long, 

 slender, glabrous. Leaves about an inch in length ; the radical ones rosulate, 

 rounded at the extremity ; cauline ones entire or somewhat toothed. Ra- 

 cemes loose; the pedicels filiform and spreading. Siliques distant, one inch 

 long; straight, rather acute. Stigma sessile. 



3. C. bellidifoUa (hmn.) : leaves glabrous, somewhat fleshy; the radical 

 ones ovate, petioled, entire ; cauline ones few, entire or 3-lobed ; siliques 

 erect; stigma nearly sessile.— Z>C. syst. 2. p. 249; Hook.! ft. Bor.-Am. I. p. 

 44. C. rotundifolia, Bigel. ! fi. Bast. ed. 2. p. 252. 



White Mountains of New Hampshire, Bigelow, Oakes ! Arctic Ameri- 

 ca and Rocky Mountains, Unalaschka, and California, Douglas ! June-July. 

 —11 Plant 2-4 inches high. Raceme corymbed. Petals cuneiform, twice 

 as long as the calyx, white. Siliques about an inch long, straight. 



* * Leaves ternately or pinnately divided. 



4. C. purpurea (Cham. & Schlect.): nearly glabrous; radical and cauline 

 leaves 3-5-foliolate ; lateral leaflets roundish-oval, acute ; the terminal one round- 

 ish and cordate, 3-toothed ; lower pedicel furnished with a leaf-like, cuneiform, 

 3-toothed bract ; petals (deep purple) reticulately veined. Cham.. ^ Schlecht. 

 in LiwKza, 1. p. 20 ; Hook.fi. Bor.-Am. l.p. 44 ; Hook. ^ Am. hot. Beechey, 

 p. 121. 



Island of St. Lawrence, Chamisso ; and Kotzebue's Sound, Beechey.— 

 Radical leaves many, cauline leaf solitary ; all on long petioles. 



5. C. angulata (Hook.): leaves petioled, 3- (rarely 5-) foliolate, angled or 

 incisely lobed, acute or cuneiform at the base, glabrous ; radical ones round- 

 ish ; cauline ovate or lanceolate. Hook. ! in hot. misc. 1. p. 343. t. 69, <^fi. 

 Bor.-Am. 1. p. 44. Dentaria angulata, Nutt. ! mss. 



/?. alha: leaves pubescent, always 3-foliolate ; flowers Avhite.— Dentaria an- 

 gulata /?. alba, A'^/iZ. .' mss. 



Banks of the Oregon, Scolder ! and near the outlet of the Wahlamet, 

 j^uttall .'—If Roots long, creeping, fibrous. Stem 12-18 inches high. Ra- 

 dical leaves on petioles 3-6 inches long. FloAvers in corymbose racemes, as 

 large as in C. pratensis : pedicels 4-6 lines long, spreading. Sepals scarcely 

 one-fourth the length of the petals, broadly ovate, rather acute. Petals in a. pale 

 rose color ; in /?. white, obovate, emarginate, spreading ; claws much exserted. 

 " Silique lanceolate, nearly a line in breadth." Nutt. 



6. C. pratensis (Linn.) : stem erect or decumbent ; leaves pinnately 7-13- 

 foliolate ; leaflets mostly entire, often petiolulate, those of the radical leaves 

 roundish, of the cauline ones oblong or linear ; style short and thick. — Pursh, 

 ft. 2. p. 440 ; DC. prodr. 1. ]9. 151 ; Hook. ! ft. Bor.-Am. 1. p. 45. 



