CRUCIFER.E. (MUSTARD FAMILY.) 25 



* Leaves entire : flowers conspicuous : perennials. 



1. C. rotundifolia, DC. Rout fibrous: .stein simple, 6'- 12' high, soon 

 bearing from the root or upper axils long ami leafy ruimers ; leaves oval or 

 roundish, with wavy or toothed margins, the lowest long-petioled ; silique subu- 

 late; seeds oval. Cool springs. Mountains of North Carolina. June -July. 



2. C. rhomboidea, DC. Hoot tuberous; stem without runners, 12'- 

 18' high ; lower leaves round-cordate, petioled, the upper oblong-ovate, toothed, 

 sessile ; silique fusiform ; seed roundish. Wet springy places, chiefly in the 

 upper districts. May. 



* * Leaves pinnatelt/ divided : flowers small : annuals. 



3. C. hirsuta, L. Smooth or hairy; stems branching, ^-2 high; 

 leaves pinnate, the leaflets varying from oval to linear, toothed or entire ; 

 silique narrow-linear, erect ; seeds minute, oval. \Vet ground, sometimes in 

 dry soil. April - May. 



4. C. Clematitis, Shutthv. Smooth, 6'- 12' high; leaves broadly 3- 

 lobed and toothed, the lowest reniform, entire ; racemes short ; silique narrow- 

 linear, compressed, tipped with the slender style. Cool shaded banks, 

 mountains of North Carolina. July. 



5. C. (1) CUrvisiliqua, Shutthv. Stem erect from the creeping base, 

 6'- 12' high, branching ; leaves pinnate, the leaflets few, oblong, the terminal 

 one larger, oval or obovate ; racemes at length elongated ; silique subterete, 

 incurved, the valves finely veined ; tipped with the short thick style ; seeds 

 wingless, oval, einarginate. Wet places, ditches, etc. Florida. 



3. DENTABIA, L. TOOTHWORT. 



Silique linear. Seeds ovate, in a single row in each cell, on a flattened 

 stalk, not margined. Style slender. Perennial smooth herbs, erect from 

 a fleshy rootstock, the simple stem bearing at the summit 2-3 palmately 

 divided leaves, and a single loug-peduncled raceme of large white or purple 

 flowers. Radical leaves mostly separate and solitary. 



# Rootstock continuous : flowers white. 



1. D. diphylla, Michx. Stem 6'- 9' high; leaves 2, ternate, long- 

 petioled ; leaflets ovate-lanceolate, coarsely toothed, of the radical leaf ovate or 

 roundish. Rich woods. Mountains. April. 



2. D. multifida, Muhl. Stem slender, 6' -12' high; leaves ternate, 

 leaflets divided into three simple or pinnately parted linear entire segments. 

 Rocky woods in the upper districts. April. 



* * Rootstock jointed: flowers mostly purple. 



3. D. laciniata, Muhl. (PEPPER-ROOT.) Stem 4'- 12' high ; leaves usu- 

 ally 3,3- 5-nate ; leaflets varying from oblong to linear, coarsely and sharply 

 toothed or lobed ; the radical similar. Rich woods in the middle and upper 

 districts. March. 



4. D. heterophylla, Xutt. Stem 6'- 12' high; leaves mostly 2, small 

 (!' or less), teruate, the leaflets lanceolate or linear, entire; radical leaves 

 with large ovate crenately toothed leaflets. Rich woods in the upper dis- 

 tricts. March. 



