' 24 . DICOTYLEDONOUS. 



1. S. ArREA. Stem 3-sidecl, branching. Leaves pinnately parted, seff- 

 ments of raaical ones more or less toothed. Flowers m\edSY racemes. »SV 

 pals linear- oblong, yellow. Petals spatulaie, longer than the calyx. Seeds 

 m a double series, orbicular, dotted, with a thin rigid border. Radicle 

 scaroely half as long on the cotyledons. 



Yellow, fragrant. <D. Florida. March— April. 4-8 inches. 



Tribe V. ALYSSINEtE. 



Silicle dehiscent ; valves plain or convex ; septum broadly 

 oval, membranaceous. Seeds compressed, with the radicle on 

 its side. 



Genus XL VESICARIA. 



Silicle globose or ovate, with hemispheric valves. Seeds 

 sometimes margined, 8-12. Petals entire. 



1. V. Pallida. Stem somewhat pubescent, slender, decumbent, much 

 branched. Leaves sessile, narrowed at the base, coarsely toothed. Sepals 

 hairy ehptical, oblong. Petals obcordate, longer than the calyx. Style distinct. 

 Silicle globose, glabrous two celled with 6 ovules in each cell. 

 J>Jearly white. @. Florida. 12-15 inches. 



Genus XII. DRABA. 



Silicle oblong-lanceolate or oval, minutely hispid, especially 

 along the margin, or glabrous. Seeds numerous. Calyx equa]. 

 Petals emarginate or entire. 



'?->' 



1. D. CuNEiFOLiA. 5'-fem leafy at the lower part, very pubescent, slender. 

 Leaves with few teeth ; cauline ones oblong-ovate, narrowed at the base; 

 radical ones spatulate-oblong. Plcwers large ; petal several times the length 

 of the calyx. 



White. #. Florida. 4-8 inches. 



2. D. Carolinia^va. Stem leafy and hispid at the base, naked and smooth 

 above. Leaves hispid, entire. Flowers corymbic or racemed ; petals oblong 

 twice as long as the sepals, or minute, and sometimes wanting. Silicle near- 

 ly Hnear, glabrous, 4-6 Hues long, many seeded. 



White. #. April & June. Middle Geo. 1-6 inches- 



3. D. Brachycarpa. Stem simple or branched, leafy. Leaves, cauline 

 ones hnear or oblong, with 2 or 3 minute teeth or entire ; radical ones roun- 

 dish ovate, petioled. Flowers in racemes, many flowered ; silicles oval, gla- 

 brous, cells 5-6 seeded, petals entire or slightly emarginate. 



Var. Fastigiata. Stem more pubescent, seldom branched ; radical leaves? 

 generally 4 toothed, silicle pubescent. 



White. ^. March— April. IMiddle Georgia. 



Tribe VI. LEPIDINE^. 



Silicle compressed opposite the narrow septum ; valves 

 boat-shaped. Radicle never turned to the side, but generally 

 on the back. 



