32 CRUC1FERJE. [Brassica. 



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 (/emmifera (brussels sprouts and savoys) ; eapita'ta 

 (red and white cabbage) ; Caulora'pa (cole rabi) ; Botri/tis (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. polymorplia, 

 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 Xa'pvs as all British, and affirms that the latter is 

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

 baga, L.. the swede ; and B. Ra'pa, L , the turnip, with 3 varieties sati'va, 

 sylves'tris, and Briyfsii. 



B. CAMPEs'TRrs proper {Linn. Herb.) ;. leaves glaucous, flowers pale orange. — 

 Var. oleifera, DC. ; rodt slender spindle-shaped — (yields rape and colza). — 

 Var. Napo-brassica, DC. ; root tuberous, neck elongated. B. Rutaba'ya, 

 DC — (swediih turnip). 



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

 Var. rapifera, Ko?h ; root tuberous (turnip). --Var. campes'tris, Ko?h ; 

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

 Wats., is an annual form from Cornwall. 



3. B. monen'sis, Huds. ; leaves petioled deeply pinnatifid, segments 

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

 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. di im., 



pale yellow. Pods lh-2h in., spreading ; beak thick ; sjeds globose, dark, 



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



Pyrenees.) 

 B. mones'sis proper; glabrous, stem nearlv simple, leaves chiefly radical. 



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

 Sub-sp. B. Cheiran'thus, T'illars ; hispid, stem branched leafy. Cornwall ; 



Channel Islands ; introduced elsewhere. 



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



* Pods erect, oppressed to the stem ; valve 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 ; 



