494 



CRUCI FERAE 



Iodanthus 



~T5 



Map 1014 



odanthus pinnatifidus (Mich».) Steud 



throughout the state. I have specimens from fallow fields, an orchard, 

 roadsides, and railroads. 



Nat. of Eu. ; N. Y. to Wash., southw. to Fla. and Calif. 



2963. IODANTHUS T. & G. 



1. Iodanthus pinnatifidus (Michx.) Steud. Purple Rocket. Map 1014. 

 More or less frequent and locally common in moist, alluvial soil along 

 streams and on the adjacent wooded slopes, rare elsewhere throughout 

 the state although there" are no specimens or records from the northern 

 fourth of the state. 



Western Pa. to Minn., southw. to Tenn., Mo., La., and Tex. 



2965. RORIPPA Scop. 



Pedicels of mature pods not more than 3 mm long; pods oblong, somewhat flattened, 

 mostly 6-9 mm long and about 2 mm wide. 

 Styles of pods about 0.5 mm long; seed minutely pitted, about 0.5 mm wide and 



as long or slightly longer 1. R. sessiliflora. 



Styles of pods about 1 mm long; seed more or less pebbled. (See excluded species 



no. 263, p. 1052.) R- obtusa. 



Pedicels of mature pods mostly more than 3 mm long. 



Petioles of leaves, at least the median ones, auriculate at the base; pods widely 

 spreading, linear, oblong-linear to ovate-oblong. 

 Mature pods less than 5 mm long, the oblong type generally 3-4 mm long and 

 about 1.5 mm wide; styles 0.5-1 mm long; seed minutely pebbled, about 0.6 

 mm wide and as long or longer. 



Stem and leaves glabrous, or nearly so; pods 3-4 mm long 



2. R. palustris var. glabrata. 



Stem and leaves more or less pubescent; pods usually less than 3 mm long, 



rarely 3.5 mm long 2a. R. palustris var. hispida. 



Mature pods 7-15 mm long; styles 2-3 mm long. (See excluded species no. 264, 



p. 1052.) R- sinuata. 



Petioles of leaves not auriculate at the base; perennials with creeping rhizomes; 

 flowers bright yellow; pods usually slightly curved, mostly about 1.5 cm long 

 and 1 mm wide; styles of mature pods 0.5-1.5 mm long 3. R. sylvestris. 



