96 



Cole Crops 



sidered to oe oi che same species, B campestris var. Napus, 

 Babington {B. JS/apus, Linn.). 



4. B. Rapa, Linn. Sp. PI. 666. {B. campestris var. Rapa, 

 Hartm. Handb. Skand. Fl. ed. 6, 110. 1854.) Turnip. Plant 

 green, slightly or not at all glaucous, the foliage usually rough- 

 ish to the hand: root tuber flattened or globular, sometimes 

 oblong white- or yellow-fleshed, the top part often purple, the 

 neck short : root leaves not thick, mostly long-pinnatifid, the 

 lobes in several irregular uneven pairs and successively smaller 

 downward, but sometimes tapering gradually from the broad 

 blade to a narrowly w^inged petiole and without large lobes; 

 leaves usually sparsely setose-hairy on the ribs beneath, at 

 least in the young expanding foliage; upper stem leaves obo- 

 vate to oblong to lanceolate in outline, the margins of the 

 larger ones irregular and notched, often narrowed toward the 

 base, clasping: flowers small (14 to % in. long), bright yellow, 

 the clusters short in anthesis : pods about ll^ in. long exclu- 

 sive of the slender conical beak.— Nativity undetermined. 

 (Rapum is a Latin word for turnip.) 



5. B. pekinensis, Rupr. Fl. Ingr. i, 96. 1860. (Sinapis 

 pekinensis, Lour. Fl. Cochin, 400. 1790. B. Pe-tsai, Bailey, 

 Bull. 67 Cornell Exp. Sta. 190. 1894.) Pe-tsai. An erect 

 green soft-foliaged annual of quick growth: radical leaves 

 many, large, veiny and crinkled, 12 to 20 in. long, oblong or 

 broadly obovate in outline, the top broad and rounded, taper- 

 ing below and vanishing to the lower end of the very broad 

 whitened midrib, the upper margins wavy, the lower margins 

 jagged-notched; stem leaves multiform, sometimes broad and 

 clasping, sometimes merely sessile, sometimes petioled, in shape 

 various, the margins notched or crinkled or in the upper leaves 

 entire: flowers light yellow, about % in. long, the cluster 

 short in anthesis: pod stout, 1 to 2 in. long exclusive of the 

 short cone-shaped blunt beak. — Probably native in China. 

 See page 88. 



6. B. rugosa, Bailey, Bull. 67 Cornell Exp. Sta. 191. 1894; 

 Prain, Bull. 4, Dept. Land Rec. and Agr., Bengal, 11. 1898, 



