388 TETRADYNAMIA SILIQUOSA 



in which it was short and branched (2 or 3-forked), especially on the disk of the 

 loaves. Authors differ much with respect to the duration of the root. I incline 

 to the opinion of Mr. Kuttall, that it is perennial. 



4. S. Thaliancm, Hook. Leaves obscurely dentate, pilose; radical 

 ones numerous, elliptic-oblong, sub-petiolate, cauline ones lanceolate, 

 sessile ; siliques ascending, ratber longer than the pedicels. Hook. 

 Brit. Flora, e<L 2. p. 303. 

 Arabis Thahana. L. and the Authors quoted in this -work. 



Thalian Sisymbrium. Vulgo — Wall Cress. Mouse-ear Cress. 

 Gallice — Arabette des Dames. Germanice — Das Gaensckraut. 



Root annual. Stem 3 or 4 to 12 inches high, often several from the same root, 

 striate, hirsute below, and often purple at base, smoolhish above, branched, 

 branches axillary, slender and flaccid. Radical leaves numerous, spreading on 

 the ground in a circle, 1 to 2 inches long, and 1 fourth to half an inch wide, hir- 

 sutely scabrous, tapering to a flat petiole at base ; stem-leaves distant, smaller, 

 lanceolate and lance-linear, hairy and mughish, denticulate, ciliate, narrowed at 

 base, sessile. Racemes 1 to 3 or 1 inches long, loose ; pedicels about half an inch 

 long, spreading. Petals white, oblong, erect, obtuse, inconspicuous, nearly twice 

 as long as the calyx. Siliques about 3 fourths of an inch long, narrow, linear, 

 ascending, pointed with a very short style ; valves with a very slender central 

 nerve. 



Hab. Old fields; along Brandywine: frequent. Fl. April. Fr. June. 



Obs. This is probably an introduced plant ; but is extensively naturalized. 

 Throe or four additional species are enumerated in the U. States. 



320. BRASSICA. L. DC. Syst. 2. p. 582. 

 [Supposed to be from Bresic ; the Celtic name for the Cabbage.] 



Calyx equal at base, erect. Petals obovatc. Filaments entire. Si* 

 lique subtcrete ; valves concave, or slightly keeled with a central nerve; 

 style short, obtuse. Seeds in a single series, subglobose; cotyledons 

 incumbent, conduplicate. 



1. B. olkhacka, L. Leaves fleshy, rcpand y or lobed, glaucous, 

 always glabrous. DC. Prodr. 1. p. 213. 



Oleuaceous Buassica. Vulgo — Cabbage. 



Gallice — Chou potager. Germanice — Dcr Kohl. Hispanice — JBerza. 



The following Sub-species, or Varieties, are more or less cultivated, 

 here — 



Sub-species C. bullata, DC. Stem somewhat elongated ; young 

 leaves subcapitate, finally expanding y bullate-rugose, or curled ; 

 racemes paniculate. 



Vulgo — Savoy Cabbage. Curled Cabbage. Brussels Sprouts. 



Gall. — Chou de Savoie. Qcrm.-Savoyer Kohl. Hisp.-Herza crespa. 



Sub-species D. capitata, DC. Stem short / leaves concave* not 

 bullate, packed in a dense head before flowering ; racemes panicu- 

 late. 



