CABBAGE FAMILY 



47 



of which are used as cattle-food ; and B. Rdpa (Turnip), with 

 turnip shaped root, lower leaves hispid but not glaucous, upper 

 leaves glaucous and glabrous, and bright yellow flowers, which is 

 perhaps the most truly wild and ancestral form. 



3. B. monensis (Isle of Man Cabbage). — Rhizome stout, woody; 

 stem 6 — 24 in. high, usually prostrate 5 leaves mostly radical, 

 glabrous, deeply pinnatifid ; flowers bright lemon-yellow, veined 

 with purple. — Sandy sea-shores on the west coast of Britain ; rare. 

 — Fl. May — August. Perennial. 



4. B. Cheirdnthus (Jersey 

 Cabbage) is an allied species, 

 found in the Channel Islands, 

 differing in having an erect 

 leafy stem, 1—3 feet high and 

 hispid leaves. 



13. Sinapis (Mustard). — 

 Herbs, annual or biennial, very 

 similar to the Cabbages ; but 

 with spreading sepals. (Name 

 from the Greek sindpi,musta.rd.) 



1. S. nigra (Black Mustard). 

 — Stem 2 — 3 feet high, branch- 

 ed, hispid ; lower leaves large, 

 rough, lyrate ; upper leaves 

 lmear-lanceolate, stalked gla- 

 brous; flowers \ — \ in. across, 

 yellow ; pods erect, adpressed, 

 4-angled, glabrous, beak short, 

 subulate. — Fl. June— August. 

 Annual. Its seeds yield table 

 mustard. 



2. S. adpressa, growing in 

 sandy places in the Channel Islands, is more branched and has 

 very short pods. 



3. S. arvensis (Wild Mustard, Charlock). — Hispid ; leaves 

 lyrately pinnatifid, rough ; flowers sub-corymbose, \ — f in. across, 

 bright yellow ; pods spreading, linear, many-angled, generally 

 hispid, 1 \ — 2 in. long, constricted. — A common weed in corn- 

 fields, sometimes springing up in profusion from recently disturbed 

 ground, though previously unknown there. — Fl. May — August. * 

 Annual. 



4. S. alba (White Mustard). — Hispid with reflexed hairs ; 

 flowers \ in. across, yellow; pods spreading, 2 in. long, hispid 



sinAms arvensis {Wild Mustard, Charlock). 



