FLORA OF GLAMORGANSHIRE 



By H. J. RIDDELSDELL, M.A. 



♦ 



The following list of the flowering plants and vascular crypto- 

 gams of Glamorganshire (v.-c. 41 of Watson), proceeds, wherever 

 possible, upon the lines of my own observations. Only in very rare 

 cases is the history of a plant's discovery touched upon. Nearly all 

 occurrences which I have established myself are given on that 

 authority alone, regardless of previous records. On the same 

 principle, records of plants seen in herbaria are preferred to mere 

 written records. The list has, therefore, in the main, a personal 

 character. Plants or localities recorded otherwise than by myself 

 bear indications to that effect. 



For convenience sake the county is divided into nine districts, 

 which mostly correspond with the drainage areas of the principal 

 rivers. A geological arrangement would have been hopeless, in 

 spite of the great mass of the coal measures in the northern half of 

 the county : for the series in the other parts of the county are split 



—except in the case of the Triassic series, and of the Gower 

 mountain limestone — into very small areas. The districts are : — 



up 



1. GOWER 



Cf 



the Peninsula, and marked by the 



; comprisin 

 arbitrary boundary, on the east, formed by the L.N.W.K. from 

 Mumbles Road Station to Gowerton; thence by the G.W.E. to 

 where it crosses the county boundary at Loughor. The district has 

 a large sea-board, and no very high hills ; but a number of elevated 

 commons in the centre and west, and a great range of limestone 

 sea-cliffs, with numerous bays and extensive sandy burrows. The 

 old red sandstone occurs in large patches on Cefn Bryn, Rhosili 

 Down, &c. : the coal measures occupy the whole eastern part of 

 the district : otherwise the soil is the mountain limestone. 



2. Loughor : A narrow strip bounded on the south by a line 

 running from the summit of Swansea Town Hill westwards to a 

 point about one-third of a mile north of Dunvant Station of 

 L.N.W.R. The eastern boundary begins at Penller Castell on the 

 Caermarthenshire border, and follows the watershed over Mynydd 

 Gwair, just east of Llangyfelach Church, over the Cockett Tunnel. 

 It is confined to the coal measures, which rise to 1226 ft. at Penller 



Castell. 



Journal of Botany, 1907. [Supplement.] 



a 



