CG CRrciFKR.E. (mustaud family.) 



3 lanceolate or llnear-olilong sorneirliat toothed (sometimes incised or 2-cleft) leaflets; 

 root-leuws of ti rounded or cntmile-orate tiicimd Ixijltts ; petals purple. — Peiin. 

 (near riiiladelpliia, Dr. Diffenbawjh) and Washington {Bcbb) to Kentucky and 

 southward. April, May. 



4. D. lacini^ta, Muhl. Rootstoch as in the last ; stem-leaves^ in a whorl, 3- 

 paiied ; the led/lets liiieiir or lanc(olute, irregularly cut or deft into prominent nar- 

 row teeth, the lateral ones (lee])ly 2-lobed ; root-leaves siniilarli/ diKSecttd ; jxtals 

 pale purple or nearly white. — Kieh soil along streams, W. New England to 

 Wisconsin and Kentucky. April, May. 



5. D. multifida, Muhl. More slender and delicate than the last; root- 

 stock similar ; n/ciu-ledres 3 or sometimes 2, alternate, opposite, or whorled,yi/ie/y 

 2 -3-tem(iteli/ divided, or the subdivisions jjarted, ?;ito very narrowly linear lobes; 

 root-leaves similarly 3-4-ternately divided; flowers (4-7) white. — Southern 

 Kentucky (doubtless) and southward. — This appears to pass into No. 4 ; and 

 all these species except the first probably run together. 



4. CARDAMINE, L. Bitter Cress. 



Pod linear, flattened, usually opening elastically fi-om the base ; the valves 

 nerveless and veinless, or nearly so. Seeds in a single row in each cell, wing- 

 less ; their stalks slender. Cotyledons accumbent. — Flowers white or purple. 

 (A Greek name, in Dioscorides, for some Cress, from the cordial or cardiacal 

 qualities.) — Huns into Dentaria on the one hand, into Arabis on the other. 

 * Rout perennial : leaves simple or 3-foliolate. 



1. C. rhomboidea, DC. (Spuing Cress.) Stems vprir/ht from a tuberif- 

 erous base, simple ; root-leaves round and rather heart-shaped ; lower stem-leaves 

 ovate or rhombic-oblong, somewhat petiolcd, the upper almost lanceolate, all 

 somewhat angled or sparingly toothed; jjods linear-lanceolate, pointed with a 

 slender style tipped with a conspicuous stigma ; seeds round-oral. — Wet mead- 

 ows and springs ; common. Flowers large, white. April -June. 



Var. purpurea, Ton-. Lower (4' - 6' high), and slightly pubescent ; leaves 

 rounder; flowers rose-purple, appearing earlier. — Along streams in rich soil, 

 W. New York and S. Pennsylvania to Wisconsin and northward. 



2. C. rotundifdlia, Miehx. (Mountain Watek-Ckess.) Stemshranch- 

 ing, weak or decumbent, making long runners ; root fibrous; leaves all much alike, 

 roundish, somewhat angled, often heart-shaped at the base, pctioled, the lowest 

 frecjuently 3-lol)eil or of 3 leaflets ; pods iinear-awl-shaped, pointed with the 

 style; stigma minute; seeds oval-oblong. — Cool shaded springs, Pennsylvania 

 and southward along the mountains. May, June. — Leaves with just the taste 

 of the true \\';^t^■r-('r^'ss. Flowers white, smaller than in No. 1. 



3. C. bellidifblia, L. Am// (2' -3' high), tufted; leaves ovate, entire, 

 or sometimes 3-lol)ed (4" long), on long j)etioles ; pods upright, linear ; sti/le 

 nearly none. — Alpine summits of the White Mountains and Katahdin, Maine 

 (./. \V. Chickering). July. — Flowers 1-5, white. Pods 1' long, turgid, the 

 convex valves 1-nen'ed. (Ku.) 



* * Root perennial : leaves pinnate : flowers shoioy. 



4. C. prat6nsis, L. (Cuckoo Flower.) Stem ascending from a short 



