Cardamine. CRUCIFER^. 83 



16. A. canescens (Nutt. ! mss.) : "crespitose, densdy and rancscontly pu- 

 bescent with stellate hairs ; leaves entire, linear, dense, crowded about the 

 root ; those of the stem mucii smaller, sessile ; siliiiue broadly linear, Hat, 

 nearly straii^^ht, pendulous, acute ; stigma sessile. 



" Summits of high hills in the Rocky Mountain range.— Ij: Plant about 

 a span high. Stems' numerous, springing from the tuft of leaves at the 

 crown of the root. Leaves nearly an inch long, rather obtuse, the pubes- 

 cence very short; radical ones attenuated at the base. Raceme short; 

 flowers very small. Pedicels about as long as the calyx. Sepals oblong. 

 Petals spatiilate-oblong, twice the length of the sepals, pale purple. Silique 

 an inch and a half long, nearly ahne and a half broad, somewhat torulose." 

 A^,,Y/._Seeds with a broad margin, lying horizontally in the cell; the 

 radicle superior : funiculi free. 



X Doubtful species. 



17. A. reptans (Lam.) : leaves roundish, entire, hirsute ; runners creep- 

 ing. DC— Lam. diet. l.p. 122 ; DC. syst. 2. p. 242. 



Sandy fields, Pennsylvania to Virginia, Pursh.— Is it Draba Carohni- 

 ana ? 



7. CARDAMINE. lAnn. ; Lam. ill. t. 562 ; DC. syst. 2. p. 245. 



Silique linear ; valves plane, nerveless, usually • dehiscing elastically. — 

 Seeds ovate, rarely bordered : funiculi slender. — Leaves petioled. Flowers 

 white or pale purple. 



* Leaves undivided. 



1. C rotundifolia (Michx.) : glabrous or somewhat hirsute ; leaves en- 

 tire or repandly toothed; radical ones on long petioles, ovate or nearly or- 

 bicular ; upper ones mostly sessile, oval-oblong or lanceolate ; root usually 

 luberiferous. 



a. stem erect or fiexuous, simple or rarely branching above ; radical and 

 lower cauline leaves subcordate ; flowers white. — C. rhoiuboidea, DC. syst. 

 2. p. 246 ; Hook. ! hot. misc. 3. p. 239, t. 108 ; Darlingt. ! Jl. Cest. ed. 2. 

 p. 384. Arabis rhomboidea, Pers. syn. 2. p. 204 ; Nutt. gen. 2. p. 70 ; Ell. 

 sk. 2. p. 149. A. tuberosa, Pers. I. c. A. bulbosa, Muhl. ! cat. p. 63. 



/?. stem erect, simple, hairy ; leaves somewhat fleshy, the radical ones 

 roundish cordate or reniform ; cauline ones strongly repand-toothed ; flowers 

 large, deep rose-color, or purple. — C. rotundifolia, Hook.Ji. Bor.-Am. l.p. 44. 

 Arabis Douglassii, Torr. ! in Sill. jour. 4. p. 63. 



y. stem at first simple, afterwards sending ofT decumbent leafy stolons, 

 which often take root ; leaves obtusely repand-toothed, membranaceous ; root 

 mostly fibrous ; flowers small, white.— C. rotundifolia, Michx. ! fl. 2. p. 30; 

 DC syst. 2. p. 247 ; Hook. ! hot. raise. I. c. t. 109 ; Darlingt.! I. c. 



a. Wet meadows, Massachusetts ! to Georgia. H. Hudson's Bay, Rocky 

 Mountains, Lake Superior! Western part of the State of New York ! to 

 Kentucky ! y- Shady springs and rivulets. New Jersey ! Pennsylvania ; 

 April-May.— if Plant 6-12 inches high. Leaves variable in size and form; 

 the radical ones usually about an inch in length and breadth. Racemes 10- 

 20-flowered; flowers in c and 0. half an inch in diameter; in y. about half 

 as large. Siliques spreading (in a. and fi. three-fourths of an inch long ; in y. 

 shorter), acuminated with the short style. Seeds few, orbicular.— Having 

 had several opportunities of examining the C. rotundifolia of our friend Dr. 

 Darlington in a living state, we are satisfied that it is not specifically distinct 



