Dentaria. CRUCIFERiE. 59 



3. Dentvria maxima, Nutt. Large Tooth-wort. , 



Stem tall ; leaves 5-7, alternate, remote, the margin a little roughened ; leaflets somewhat 

 oval, incisely and acutely toothed ; lateral ones lobed ; (flowers pale purple.) — Nutt. gen. 

 p. 66 ; DC.prodr. I. p. loo; Torr. <^ Gr.fl. N. Am. 1. p. 87. 



Stem often nearly two feet high. Tubers concatenate {Nutt.). 



Western part of the State of New-York (Nuttall). This must be an extremely rare plant, 

 as I am not aware of its having been found by any botanist except its discoverer. 



Tribe II. SISYMBREjE. DC. 



Silique longitudinally dehiscent ; valves nearly plane, or so?newhat terete and carinate : 

 septum linear. Cotyledons plane, incumbent (i. e. with the radicle applied to the hack of 

 one of the cotyledons, \\0), contrary to (i. e. with the edges toioards) the septum. Seeds 

 not bordered. 



7. SISYMBRIUM. Allioni ; Endl. gen. 4906. HEDGE MUSTARD. 



[An ancient Greek name applied to some plant believed to he of*lhis genus.] 



Silique somewhat terete. Stigmas 2, somewhat distinct, or connate and capitate. Sepals 

 equal at the base. Seeds ovate or oblong. Cotyledons sometimes oblique. — Herbs of 

 various habit. Flowers small, mostly yellow or white. 



^ 1. Velahum, DC. SUiques subulate, terminated with a short style : pedicels very short, thickened 

 and appressed to the axils after flowering. 



1. Sysymbrium officinale. Scop. Comtnon Hedge Mustard. 



Leaves runcinate, and, as well as the stem, hairy ; flowers very small (yellow). DC.prodr. 

 1. p. 191 ; Hook. fl. Bor.-Am. 1. p. 61 ; Darlingt. fl. Ccst. p. 386. Erysimum officinale, 

 Linn. ; Michx.fl. 2. p. 31 ; Pursh,fl. 2. p. 436 ; Ell. sk. 2. p. 148 ; Bigel.fl. Bast. p. 253. 



j^nual. Stem more or less hairy. 1-2^ feet high, with numerous, spreading, somewhat 

 curved branches. Upper leaves somewhat hastate. Racemes elongated. Petals a little 

 longer than the sepals. Siiiqucs 6-8 lines long, tapering to a point. Seeds oval, about 4 

 in each cell. 



Road-sides and waste places : introduced from Europe. Flowers from May to September. 

 This plant has long been reputed as a diuretic and expectorant, but its powers arc probably 

 very feeble. 



8* 



