Page:Transactions of the Natural History Society of Northumberland, Durham, and Newcastle-upon-Tyne (1867).djvu/148

30. B. napus Brassica napus, L. Colonist. English type. Area C, N, D. Range 1.

Frequent in similar places to the preceding.

24. SINAPIS, L.

1. S. arvensis Sinapsis 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 Sinapsis 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 Brassica nigra, L. Colonist. English type. Area C, N, D. Range 1.

In similar stations to the two preceding, but less frequent.

4. S. tenuifolia Diplotaxis 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 Raphanus 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.