32 SCIENTIFIC SURVEY OF NORWICH AND DISTRICT 
on pathways now. Verbascum pulverulentum is still locally common in 
the Norwich district. 
An interesting case of hybridisation between Tragopogon porrifolius and 
the small form of 7. pratensis took place on a piece of derelict ground at 
Yarmouth recently, the F. 1 hybrids appearing first in 1929. Subsequent 
generations have produced sixteen distinct forms, most of them reappear- 
ing each year on the original plot, while others have been the subject of 
experiment (5). 
CONSERVATION OF THE FLORA. 
This county is fortunate in its protected areas, administered by the 
Norfolk Naturalists’ Trust, such as Scolt Head, Blakeney Point and 
Alderfen Broad. Of necessity, much of the breckland will be altered 
through afforestation. Hockham Mere has been drained recently and 
its flora is changing already to a marked degree. Reclamation in the 
Wash has greatly reduced the area attractive to botanists there. Many 
of the smaller heaths have suffered from fire damage, especially in the 
dry summers of 1933 and 1934; this menace calls for more organised 
effort in combating it, as the effects on wild life are often irreparable. 
The northward extension of Great Yarmouth imperils many of the 
peculiar species there, and already the main portion of the denes has been 
levelled and the endemic flora destroyed. 
Fen development is so rapid that the preservation of its character 
becomes a matter for man’s intervention in the interests of biology. ‘The 
natural dominants of this type of community require periodic setbacks 
such as the removal of floating reed-bed where it tends to block channels, 
the clearing of patches in carrs, and the mowing of selected pieces of 
marsh. This is being done successfully by the owner of a large tract of 
fen and small broads at Surlingham. 
It is more than ever necessary for an authoritative conclave of botanists 
to keep watch over the county’s flora at vulnerable spots, and be recognised 
in its efforts to avert botanical calamities. 
BIBLIOGRAPHY. 
Phanerogamia. 
. Bennett, A.: Norf. Nat., x, 126, 177 and 478 ; Xi, 3133 Xil, 477. 
2. BURRELL, W. H., and CLarkE, W. G.: ‘ Norfolk Notes,’ Fourn. Bot., 
1911, p. 267; in Norf. Nat. : ‘ Flordon Common,’ ix, 170; ‘ Vegeta- 
tion Survey of Norfolk,’ ix, 743. 
. CHAPMAN, V. J.: ‘ Scolt Head Island,’ Handbook, Cambridge, 1934. 
. CLarKE, W. G.: ‘ Norfolk Plants,’ Journ. Bot., 1917, p. 191 ; in Norf. 
Nat. : ‘ The Commons of Norfolk,’ ix, 152 ; ‘ The Breckland Sand 
Pall and its Vegetation,’ x, 138; ‘The Chalk Flora of Norfolk,’ x, 
207; also x, 171, 5043 xi, 179, 329. In Breckland Wilds, London, 
1925. 
5. Exuis, E. A.: ‘ Wheatfen Broad, Surlingham,’ Norf. Nat., xiii, 422 ; 
‘ Tragopogon Hybrids at Yarmouth,’ Rep. B.E.C., ix, Part I, 125 ; 
Part III, 272 ; Part V, 566. 
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