86 CRUCIFER^. Df.ntaria. 



Flowers very small, white; pedicels as long as the calyx. Silique nearly an 

 inch long, (lat; the valves obscurely reticulated. Seeds about 15 in each cell, 

 with an almost winged margin. — Easily distinguished by its broad siliques 

 and margined seeds. 



'10. C. digitata (Richards.): leaves digitately pinnate; leaflets sessile, li- 

 near, entire; style short, about as thick as the silique; stigma capitate, 

 Richards, app. Frankl. journ. p. 26; DC. prodr. 1. p. 53; Hook. Jl. 

 Bor.-Am. 1. p. 45. 



Arctic America. — Stem creeping at the base (not tubcriferous, Hook.). 

 Flowers as large as in Cardamine pratensis, white or purplish. Siliques not 

 seen. Richardson. 



X Doiihtfid species. 



11. C.7 midtijida (Pursh): pubescent, branched; leaves interruptedly 

 pinnately divided; segments bipinnatifid; ultimate divisions rounded, incis- 

 ed; siliques shorter than the pedicels. DC. — Pursh., fl. 2. p. 440; DC. si/.st. 

 2. p. 267. 



Florida, near St. Augustine, Bartram in herb. Banks. — 1[ Siliques ob- 

 long, scarcely 2 lines long, glabrous; style none. Pedicels filiform. DC. — 

 Perhaps a Nasturtium. 



C reflcxa and C. angusiijolia, Raf. Jl. Lnidov., liaving been founded upon the 

 vague popular descriptions by Robin of plants which Rafinesque never saw, and of 

 which lie knew nothing whatever, of course cannot be admitted even to the rank of 

 doubtful species. 



8. DENTARIA. Linn. ; DC. syst. 2. p. 271. 



Silique lanceolate ; valves plane, ncrvless, often dehiscing elastically : pla- 

 centae not winged. Seeds ovate, not bordered, in a single series : funiculi 

 dilated. — Perennials. Rhizoma horizontal, fleshy, often irregularly toothed. 

 Leaves ternately, palmately, or pinnately divided ; radical ones (when pre- 

 sent) on long petioles; cauline ones (often 3) near the middle of the stem or 

 scape, verticillate or alternate. Flowers white or purple. 



Scarcely more than a section of Cardamine. 



1. D. laciniata (Muhl.) : rhizoma moniliforra; cauline leaves 3, usually 

 veticillate, ternately parted; segments incised, the lateral ones lobed. — 

 MithL! in Willd. sp. 3. p. 479. f cat. p. 63 ; DC. prodr. 1. p. 1-55; Ell. 

 sk. 2. p. 144; Bart.Jl. Am. sept. 3. t. 72; Hook. Jl. Bor.-Am. 1. p. 46. D. 

 concatenata, Michx. ! Jl. 2. p. 30. 



a. segments of the leaves lanceolate or linear-lanceolate, incisely toothed. 



0. segments laciniately pinnatifid. 



y. segments narrowly linear, sparingly toothed, or nearly entire. 



<5. leaves aUernate; segments ovate, incisely toothed and lobed, a little 

 rough on the margin. 



Rich alluvial soils, Canada to Georgia ! and west to the Mississippi. Wa- 

 tertown, New-York, Dr. Craive! Macon, Georgia, Croom! April-May. — 

 Plant 4-12 inches high. Tubers of the rhizoma connected by a neck, spa- 

 ringly fibrillose, pungent to the taste like mustard. Cauline leaves verticil- 

 late above the middle of the stem, or alternate (rarely 2), on short petioles ; 

 segments variable in width and in the form and length of the teeth or laci- 

 jiiffi ; radical leaves sometmies wanting. Petals 3 times the length of the 



