CRUCIFERiE. 133 



Plate 54. 

 IODANTHUS, Torr. fy Gr. 



Siliqua linearis, teres, valvis convexis fere enerviis. Se- 

 mina in loculis uniserialia, immarginata. Cotyledones plana? 

 accnmbentes. — Calyx erectus, unguibus petalorum brevior. 



Iodanthus, Torr. & Gray, Fl. N. Am. 1. p. 72 (sub Cheirantho). Gray, 



Man. Bot. N. U. S. p. 33. 

 Hespebidis Sp., Michx. Fl. 2. p. 31. Nntt. Gen. 2. p. 69. DC. 1. c. 



False Rocket. 



Calyx erect, imbricated in aestivation : the lateral sepals 

 slightly gibbons at the base, in the bud furnished with a 

 cornute process next the apex. Petals spreading, spatu- 

 late-obovate, tapering into a narrow claw which is longer 

 than the sepals, entire, imbricated-convolute in aestivation. 

 Stamens strongly tetradynamous : filaments subulate-fili- 

 form, toothless : anthers sagittate. Glands 4. Ovary 

 linear-oblong : style short and thick : stigma hemispheri- 

 cal. Ovules numerous, alternately inserted and forming 

 only one row in each cell. 



Silique linear, terete, rather fleshy, somewhat torulose 

 when dry, tipped with the short style, two-valved ; the con- 

 vex valves not carinate or nerved on the back (or with an 

 obscure midnerve when dry) : the partition nerveless, com- 

 posed of linear-oblong longitudinal areolae, bounded by 

 nearly straight lines. Seeds several in each cell, forming a 

 single series, occupying the whole breadth of the partition, 

 oval, pendulous on short and free ascending funiculi which 

 are geniculate-inflexed at the apex, not margined. Radicle 

 ascending on the side farthest from its placenta ; the coty- 

 ledons parallel with the partition, plane, accumbent. 



Herb with a branching stem from a perennial fibrous root, 

 and oblong-ovate and acuminate leaves, which are sharply 

 and irregularly toothed ; the lower lyrate, with small lateral 



