Brassica.] in. CRUCIPEEAE. 31 



*BRASSICA, Tourn. 

 Sepals erect or spreading, equal or the lateral saccate at the base. Pods linear, 

 nearly terete or 4-angled, with a stout indehiscent 1-seeded beak. Seeds globose, 

 1-seriate ; valves 1-5-nerved. Cotyledons incumbent. Leaves often large, entire, 

 lobed, lyrate or pinnatifid. Flowers in long terminal racemes. 



*1. Sepals erect. Beassioa. 

 Leaves thick, glaucous, somewhat fleshy . . . . . . . . . . ' B. oleracea. 



Eadioal leaves glaucous, hispid. Stem leaves aurioled . . . . . . * B. campestris. 



2. Sepals spreading. Sinapis. 

 * Pods adpressed to the stem. Valves 1-nerved. 

 Pod subulate, beak short, seedless . . . . . . . . . . . . * B. nigra. 



Pod suboylindrio, beak clavate, 1-seeded . . . . . . . . . . * B. adpressa. 



** Pods spreading. Valves 8-nerved. 

 Pods longer than the compressed beak . . . . . . . . . . ' B. Sinapistrum. 



Pods beaded, equalling the beak .. .. .. .. .. .. * B. alba. 



* B. oleracea, L., Sp. PI. 667. Kootstock stout. Leaves glabrous, glaucous 

 below, lower lyrate or sinuate, upper oblong, sessile. Eaeemes elongated. Flowers 

 large. Pods 2in.-3in. long, spreading, slightly compressed; valves keeled; beak 

 short. 



NORTH and SOUTH Islands : Naturalised on sea-cliiis in many places. Maori cabbage- 

 Nov., Deo. Europe. 



* B. campestris, L., Sp. PI. 666. Erect. Lower leaves glaucous-hispid, 

 lyrate, pinnate, lobed or dentate ; cauline leaves glabrous, oblong or ovate-lanceo- 

 late, auriculate. Flowers corymbose. Beak of pod seedless. Valves 1-uerved. 



Var. campestris. Root tuberous. Radical leaves hispid. Petals persistent until the 

 corymb lengthens. Swede. 



Var. Napus. Root fusiform. Leaves glabrous. Petals falling before the corymb lengthens. 

 Rape. 



Var. Rapa. Root tuberous, fleshy. Lower leaves hispid (not glaucous), upper glabrous 

 and glaucous. Turnip. 



NORTH and SOUTH Islands : Not uncommon in cultivated districts. Var. c the most 

 frequent. Dec, Jan. Europe. 



* B. nigra, Koch in Boehl. Deutschl. FL, ed. 3, iv. 713. Glabrous, erect, 

 2ft. -3ft. high, much branched. Lower leaves petioled, rough, lyrate, or irregularly 

 lobed, toothed or entire ; upper lanceolate, glabrous, entire. Pedicels short, stout. 

 Pods tetragonous, adpressed, -lin.-fin. long : beak short, seedless ; valves 1-nerved. 



NORTH and SOUTH Islands : Naturalised in cultivated flelds and waste places, but often 

 local. Black mustard. Nov., Dec. Europe. 



* B. adpressa, Boiss, Voy. Espagne ii. 88. An erect, slender, branched herb, 

 6in.-24in. high, hispid, hairy or glabrate. Leaves lyrate or lyrate-pinnatifid ; cauline 

 few, linear-lanceolate. Pods closely adpressed to the stem, -Jin.-l-in. long, on short 

 pedicels ; beak 1-seeded, sometimes half as long as the pod. 



NORTH and SOUTH Islands : Nataralised in waste and cultivated ground. Auckland, 

 Taranaki, Wellington, and Nelson. T. K. South Europe. 



* B. Sinapistrum, Boiss, Voy. Espagne ii. 39. Stem and leaves hispid. 

 Lower leaves petiolate, lyrate-pinnatifid ; upper toothed or entire. Flowers , sub- 

 corymbose, yellow, large. Pods setose, rarely glabrous, subcylindrical, longer than 

 the 2-edged sterile or 1-seeded beak. 



NORTH and SOUTH Islands: Naturalised in cultivated ground, but somewhat local. Char- 

 loch. Nov., Deo. Europe. 



