TETRADYNAMIA. 
fere 4. singula intra calyeis foliola, squame instar 
reflexa. __ 
531. TURRITIS.  Siligua longissima, angulata, striata. 
x Cal. connivens, erectus. Petala erecta. 
532. BRASSICA, Cal. erectus, connivens, Dissepimen- 
tum prominens. Sem, globosa. Glandula inter sta- 
mina breviora et calycem. Siliqua teres, rostrata. 
533. DENTARIA.  Siligua elastice dissiliens, valvulis re- 
volutis, Dissepimentum subfangosum. Stigma emar- 
ginatum, Cal. connivens, 
** Calyx hians, foliolis superne distantibus. 
534. CARDAMINE. Siliqua elastice dissiliens, valvulis 
revolutis, Stigma integrum. ? 
535. SISYMBRIUM. Siliqua rostro brevi tereti dehiscens, 
. valvulis rectiusculis. Corolla patens. 
: $36. CLEOME. Glandule nectarifere 3. ad singulum 
sinum calycis singulz, excepto infimo. Petala omnia 
adscendentia, Germen stipitatum. Siliqua 1-locula- 
ris, 2-valvis. 
D 
I SILICULOSA. — 
520. DRABA. Gen. pl. 1076. 
1. D. scapo nudo, foliis oblongis acutis subserratis hirtis, 
petalis bifidis, stigmate sessili— Willd. sp. pl. 3. 
. 426. 
fiho. Fl. dan. 983. 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, silicu- 
lis longo-linearibus glabris approximatis,— Mich. Jf. 
amer. 2. p. 28. : 
* D. caroliniana, Walt. fl. car. 174. 
In sandy fields : Virginia and Carolina, and on the banks 
of the Missouri. ©. April—June. v.v. 
3. D. scapo subunifolio adscendente, folüs lanceolatis inte- 
gerrimis subtomentosis : pilis stellatis, petalis retusis. 
— Willd. sp. pl. 3. p. 427. 
verna. 
hispidula. 
nivalis. 
