22 DICOTYLEDONOUS. 



Genus V. LEAVEN WORTHI A. 



Calyx somewhat erect, equal at the base. Pe.tals equal, 

 cuneifortn, truncate, emarginate. Fdamenis distinct, tooth- 

 less. Si/iqw, sessile, oblong-linear, compressed, somewhat in- 

 flated, and contracted between the seeds ; valves indistinctly 

 nerved. Style distinct or almost none; Stigma minuteJv bi- 

 dentate. Seeds m a single series, flattened, with a broad 

 winged margin. Annual herbaceous plants. Learg^, lyrately- 

 pennatifid. Fteer^ in loose scapoid racemes, or solitary on 

 long sub-radical peduncles. 



I. L. AuREA. Stem at first short and simple, but at length branching from 

 the base, branches ascending. Leaves mostly radical, pinnatifid, somewhat 

 fleshy ; segments 2-4 pairs, roundish ob ong, 'obtusely toothed. Racemes 4- 

 10 flowered. Sepals loose, oblong, obtuse, tinsed with purple. Petals golden 

 yellow tapering into a long cuneate base. Sili(iue rather more than an inch 

 long. Seed^ 4-5 in a cell. Torrey ^ Gray. 



Alabama. 2-6 inches. 



Tribe II. SISYMBRE^. 



Seeds with the radicle on the back, {notorliiza) never on the 

 side, not bordered. 



Gevus VI. SISYMBRIUM. 



Silique terete, or slightly angled, with a short beak. Stigma 

 capitate. Sepals eqnal at the base, expanding. Petals ex- 

 pnndiniT. Seef's ovate or oblons:. 



1. S. Canescexs. Root annual. Stem erect, branching. Leaves 2-3 in- 

 ches long, hoary, doubly-pinatifid : segments hoary, dentate, obtuse. Flowers 

 in terminal racemes. Sepals oval, pubescent. Petals c/bovate, equaling the 

 calyx, expanding. Silique seinewhat clavate, half as long as the pedicels, 

 angled. Seeds obovate, many in each cell. 



Yellowish. kD March and April. Common. 1-2 ft. , 



2. S. Officinale. Stti/i hairy- Leaves runcinate hairy. Flowers in 

 elongated racemes, small, pedicels very short, appressed to the axis after 

 flowerinsi. Petals cuneate, larger than the calyx. Sdique subovate, tapering 

 into a short style. 



Yellow. >2). May and Aug. Waste places. 1-3 ft. Hedge Mustard. 



Fernurks.— The Vdiier p'anl possesses somewhat the pungency of mustard, and haa 

 ttpeu rpooinnieacl"d m the ireaimejii of chronic coughs, hoarseness, and ulceration of 

 the mouth. The juice with sugar, or the seeds may be taken. 



Gexits VII. ERYSIMUM. 



Silique columnar, 4-sided. Se'p^//^ deciduous, closed. Style 

 short. Sliguia small. Cotyledons oblong. 



1. E. Cheiranthoides. Sfem s'lmph or branched with a minute appres- 

 sed pubescence, somewhat scabrous. Leaves lanceolate, eniire, sometimes 

 denticulate. Silique erect, about an inch long. FZoit-ers small. 

 Yellow. July and Aug. © a cf. 1-2 ft. Along streams. 



