Brassica rapa
L., Sp. Pl. 666. 1753. B. campestris subsp. rapa Hook. f. & T.
Anderson in Hook. f., Fl. Brit. India 1: 156. 1872.
Herbs, annual or biennial; taproot slender, stout or tuberous. Basal leaves short
petioled, lyrate, bright green, hispid or with setiform hairs; upper cauline leaves sessile,
amplexicaul glaucous and glabrous. Flowers yellow, in terminal racemes, overtopping
buds. Sepals patent. Petals 4, 5 -
10 mm long. Stamens 6. Fruits glabrous, 3.5 -
10.5 cm
long. Seeds small, smooth, pale or dark.
KEY TO THE SUBSPECIES
| 1a. Roots slender | 5.1. campestris |
| b. Roots tuberous, globose or nearly so | 5.2. rapa |
