TETRADYNAMJA. 



ferae 4. singula intra calycis foliola, squamae instar 

 reflexae. 



531. TURRITIS. Siliqua longissima, angulata, striata. 



Cat. connivens, erectus. Pctala erecta. 



532. BRASSICA. Cal. erectus, connivens. Dissepiiuen- 



tum prominens. Sem. giobosa. Glandula inter sta- 

 mina breviora et calycem. Siliqua teres, rcstrata. 

 53o. DENTARIA. Siliqua elastice dissiliens, valvulis re- 

 volutis. Dissepimentum subfungosum. Stigma emar- 

 ginatum. Cal. connivens, 



** Calyx hians, folioUs superne distanlihus. 



534. CARDAMINE. Siliqua elastice dissiliens, valvulis 



revolutis. Stigma integrum. 



535. SISYMBRIUM. Siliqua rostro brevi tereti dehiscens, 



valvulis rectiusculis. Corolla patens. 

 53G. CLEOME. Glandules nectariferae 3. ad singulum 

 sinum calycis singulse, excepto inMmo, Pctala omnia 

 adscendentia. Germen stipitatum, Siliqua l-loc«la- 

 ris, 2-valvis. 



433 



I. SILICUL0S.4. 



520. DRABA. Gen.pl. WjQ. 



1. D. scapo nudo, foliis oblongis acutis subserratis hirtis, 



petalis bifidis, stigmate sessili. — Willd. sp. pi. 3. 

 p. 426. 



Icon. FL dan. gSS. Engl. lot. 586. 



In cultivated grounds and old fields : Canada to Virginia. 

 . March — May. v. v. All the species of this ge- 

 nus are small plants with white flowers. 



2. D. scapo nudo, foliis ovalibus acutis hirsutissimis, silicn- 



lis longo-linearibus glabris approximatis. — Alich. Ji. 



amer. 2. p. 2S. 

 D. caroliniana. IViilt.Jl. car. 174. 

 In sandy fields : Virginia and Carolina, and on the banks 



of the Missouri. ©. April— June. v. v. 



3. D. scapo subunifolio adscendente, foliis lancenlatis inte- 



gerrimis subtomentosis : pilis stellatis, petalis retusis. 

 — IVilld. sp. pi. 3. p. 427. 



hispidula. 



nivalis. 



