j^4 TETSADYNAMIA. SILIQUOSA, 



a. Calyx closed; Uajlds longitudinally conniving. 



251. ERYSIMUM. Nutt. Gen. 561. 

 [Gi. '■' ab cr'jo, cxtralia, quiaob suam calliditatem habet vim eruendi extra corpus quid latet." BQerh.} 

 Siliquc straight, linear, exactly 4 sided. Stigina capitate- 

 }:. oFFicNAJ.E. lOU. Lower leaves ruiicinate, upper ones sub-hastate; pods appressed to the stem. 

 Kfi/c-o— Hedge Mustard. , ^ ■, , , r 



Fl. Last of Mpy till autumn. />■ '"«'• L3.t of July, and after. 



JIab. About houses; gardens, roadsides, &c. frequent. 1 to 3 feet high: flowers greenish yellow, small. 



0'„ A naturalized foreigner. Like the generality of Tetradynareous plants, it is w-arm and acrid to the 

 »^i and aSinStoV^n^^ i" W.tl>erin|, the j.uTc has been found "beyond any lungmu'f"? f '^^ 

 liTroat.-when aSice of Doctors and Surgeon, availed nothing." I am unacquainted with its virtues- 



252. BARBAREA. Nult. Gen. 559. 



[ ^ 



,%-ilique -Isided-ancipital; sccd.^ in a single series. C«Z. erect. GVands between the short stamens and germ. 

 B VULG4.RIS Nutt. Radical leaves lyrale-pinnatifid, terminal lobe large, rounded; caulineobovate, dentate. 

 Siinon Erysimum barbarea. JVilld. Muhl. he FtJffo-Scurvy grass. Winter Cress. Yellow Rocket. 

 Fl. Middle of May. Fr. mat. Beginning of August. 



Hah. Low, muddy shores of the BrandywiOe; frequent. 1 to 2 feet high: flowers yellow. 



Of,, It seems to be doubted whether this is a native. It is, however, pretty common in the low grounds 

 .nlong our creeks. The radical leaves are frequently collected, early in the spring, and eaten as a sallad, 

 unde'r the name of "Seurvy grass." 



253. ARABIS. Nutt. Gen. 561. 

 [An ancient greek name of a plant; supposed to be a native of Arabia.'} 

 Suique linear, compressed, crowned with the stigma. Glands 4, squamiform, 1 within each calyx-leaflet. 

 A LYRATA. Nutt. Radical leaves lyrate, pilose; cauline linear, glabrous; pedicels spreading, pods erect. 

 Fl. Latter end of April, and after. Fr. mat. Last of May, and after- 



tiab. Sterile, stony hills; Barren ridge: frequent. 6 to 15 inches high: flowers white, conspicuous. 

 \ F ^LC.VT A. Ms. Leaves lanceolate, narrow at each end, obsoletely dentate; pods pendulous, falcate 

 &ynon. A. canadensis. Willd. Ell. Nutt. Fw/g;o— Sickle-pod . Turkey-pod. Wall-cress. 



Fl Beginning of June . Fr. mat. Last of August. 



Hah. Hilly woodlands; along Brandy wine: frequent. About 2 feet high: flowers white, smallish. 



Obs. The seeds of this species are encircled by a membranaceous border, the margins overlapping. 

 A. rvHOMBOiDEA. Ell. Root tuberous; leaves glabrous, sub-rhomboid, repand-dentate, lower ones roundish. 

 .^1/7! wi. A. bulbosa. Mv.hl. A. tuberosa? and rhomboidea. Persoon. F?(/g-d— Spring cress. 

 Fl. Middle of April, and after. Fr. mat. Beginning of June, and after. 



Hub. Springs, and along muddy rivulets: common. 9 to IS inches high: flowers white, large. 



Obs The fleshy root of this species is quite pungent to the taste; and Pursh thought it worthy to be intrd- 

 duced into garden^s, to be used as cresses.' Dr. ivfuhlenberg seemed to doubt whether tl^ns was not the 

 Cardamine rotundifolia, of Michr,ux,-and his dbnbt has been adopted by ISlessrs. ^ "ttall W. RC Bar on, 

 and Elliott: but I am satistied that tlie plants are clearly distinct,— as 1 have lound both, in this vicinity. 

 iS'ce Cardamine rotundifolia. 



2.54. DENTARIA. Nutt. Ge7i. 5-57. 

 [Lat. J)en::, dcniis, a tooth; from the tooth-like processes of the root.] 



Siliq\(c opening ela.stically; valves nerveless, revolute. Dissepiment sub-fungose. Stigma emarginate. 

 D. LACirviATA. Ell. Leaves in 3's,ternate; leaflets linear-oblonu;, incised-dentate; root moniliford. 

 Sipwn. D. concntenata. Mr. Fw^-o-Toolli-wort. 



FL Middle of April. Fr. mat. Beginning of June. 



Hib Rich TTooulan Is: frequent- 9 to 1.' inches high; flowers r^rplish wnite. 



