32 CRUCIFEH^. [BiiASSiCA. 



diam., pale yellow, homogamous. Pods 2-3 in., spreading, slightly com- 

 pressed ; beak short, subulate ; seeds globose. DISTRIB. W. and S. coasts 

 of Europe. Cultivated forms are aceph'ala (scotch kail, cow cabbage, 

 borecole) ; bulla'ta and gemmifera (brussels sprouts and savoys) ; capita'ta 

 (red and white cabbage) ; Caulora'pa (cole rabi) ; Botrtftis (cauliflower and 

 broccoli). 



2. B. campes'tris, L. ; erect, lower leaves lyrate-pinnate hispid, 

 upper oblong or lanceolate amplexicaul and auricled, flowering racemes 

 corymbiform, beak of pod seedless, valves 1 -nerved. B. polymorpha, 

 Syme. 



Weeds of cultivated ground; a colon : st? Watson ; fl. June-Sept. 



Mr. Dyer considers that only two primary forms of this species are to be 

 found in cultivation or as escapes in Britain ; excluding B. Na'pus and its 

 forms (of which none of the leaves are hispid) as being almost exclusively 

 Continental. He assumes that Var. oleifera is the Linnean type, described 

 as a troublesome weed in Sweden, which may be a starved state of the turnip 

 escaped from cultivation. Mr. Watson, on the other hand, considers B. 

 Ra'pa, campes'tris and No! -pus as all British, and affirms that the latter is 

 wrongly described as glabrous. B. Na'pus, L. (?) being the rape ; B. Ruta- 

 ba'f/a, L.. the swede ; and B. Ra'pa, L , the turnip, with 3 varieties sati'va, 

 sylves'tris, and Brifftfsii. 



B. CAMPES'TRTS proper (Linn. Herb.) ; leaves glaucous, flowers pale orange. 

 VAR. oleifera, DC. ; root slender spindle-3haped (yields rape and colza). 

 VAR. Na'po-brassica, DC.; root tuberous, neck elongated. B. Rutala'ya, 

 DC. ( swedidi turnip). 



Sub-sp. B, KA'PA, L. ; leaves not gaucous, flowers smaller bright yellow. 

 VAR. rapifera, Ko?h; root tuberous (turnip). VAR. campes'tris, Ko3h; 

 root spindle-shaped. --VAR. sylves'tris, Lond. Cat. (navew.) B. Briyy'sii, 

 Wats., is an annual form from Cornwall. 



3. B. monen'siS; Hurls. ; leaves petioled deeply pinnatifid, segments 

 toothed, upper linear, beak of pod 1-3-seeded, valves 3-nervcd. 

 Sea-shores on the west from Skye to S. Wales ; Channel Islands : fl. May-June. 



Rootstock usually stout, woody, perennial. Stem 6-24 in., erect or decumbent. 



Radical leaves with short broad-toothed segments. Flowers -| in. diim., 



pale yellow. Pods 1|-2| in., spreading; beak thick; sseds globose, dark, 



punctate. DISTRIB. Shores, W. and S Europe, N. Africa. (Subalpine in 



Pyrenees.) 

 B. MONEN"'SIS proper; glabrous, stem nearly simple, leaves chiefly radical. 



S. Wales to Skye ; inland at Merthyr Tydfll, S. Wales. 

 Sub-sp. B. CHEIRAN'THUS, Villars ; hispid, stem branched leafy. Cornwall; 



Channel Islands ; introduced elsewhere. 



SECTION 2. Sina'pis, L. (Gen.). Sepals spreading. 



* Pods erect, appressed to the stem; valre 1-nerved ; cells few-seeded. 



4. B. ni'gra, Koch ; stem-leaves petioled linear-lanceolate entire or 

 toothed glabrous, pods subulate 4-angled glabrous, beak short seedless. 

 Black. Mustard. 



Hedges and waste places, from Northumberland southd., common as an 

 escape, wild on sea-cliffs (Syme) ; not wild in Scotland ; S. of Ireland ; 



