30. B. napus , L. Colonist. English type. Area C, N, D. Range 1.
Frequent in similar places to the preceding.
24. SINAPIS, L.
1. S. arvensis , L. Colonist. British type. Area C, N, D. Range 1, 2.
Everywhere common in cultivated fields and waste ground, ascending to 450 yards in Weardale and Allendale.
2. S. alba , L. Colonist. English type. Area C, N, D. Range 1.
Frequent in cultivated ground, ascending in Teesdale to Eglestone (700 feet). The commonest species on Holy Island (R. Embleton).
3. S. nigra , L. Colonist. English type. Area C, N, D. Range 1.
In similar stations to the two preceding, but less frequent.
4. S. tenuifolia , Br. Denizen. English type. Area N, D. Range 1.
Frequent upon embankments and by road-sides about Shields, Sunderland, Hartlepool, &c., but perhaps originally introduced with ballast.
25. RAPHANUS, L.
1. R. raphanistrum , L. Colonist. British type. Area C, N, D. Range 1, 2.
A common weed in cultivated ground, ascending to 350 yards in Weardale, and 450 yards in West Allendale. There are two forms, one with sulphur-coloured and the other with white flowers and violet veins, both frequent.