72 CLASS XV. ORDER I. 



MiMULus. Calyx prismaiic, 5-toothecI : corol 

 ringent, upper lip folded back, upon its sides ; stig- 

 ma thick : capsule 2-celled, many-seeded. 40. 45 

 —'TingenSi (monkey-flower) leaves sessile lanceo- 

 late glabrous. 11* b. 



Chelone. Calyx 5-cleft or 5-leaved : corol 

 ringent, inflated ; the upper lip emarginate obtuse, 

 under lip slightly 3-cleft : the rudiment of a smooth 

 filament between the two tallest stamens : capsule 

 2-celled. 40.45 — ^gf/a^Jra, (snake-head) leaves lance- 

 olate serrate, upper ones opposite. %. w. — obliquaj 

 leaves all opposite. %. p. 



Pentstemon. Calyx 5-cleft or 5-leaved : corol 

 ringent inflated : the rudiment of a bearded fila- 

 ment between the two tallest stamens : capsule 2- 

 celled. (Taken from the last genus.) 40. 35 — fiii- 

 bescensy (beard-tongue) stem hairy, upper lip short. 



Martynia. Calyx 5-cleft : corol ringent al- 

 most bell-form : capsule woody and barked, with a 

 hooked beak ; 4-celled, 2-valved. 40, 42 — firobos- 

 cideat (unicorn-plant) stem branched, leaves cord- 

 ate, fruit hook-beaked. ©. w. 



CLASS XV. TETRADYNAMIA. 



Order I. Siliculosa. 



All plants of this class have flowers with 4-leav- 

 ed calyxes and cruciform corols. 



A. Siikle luHhout a notch at the end, 



Draba. Silicle oval-oblong, valves flattish, par- 

 allel to the partition : style none. 39. 63 — vernuy 

 (whitlow-grass) leaves lance-oblong acutish sub- 

 serrate, with short stiff* hairs, scape naked, petalo 

 2-cltft. 0. vf.—carolinianaf leaves ovate hirsute, 

 scape naked simple smooth, silicle linear. 2/. w. 



BuNiAs. Silicle somewhat 4-sided, not opening 



