A FLORA OF GLAMORGANSHIRE 3 



8. Taff : the largest of the districts, comprising the drainage 

 areas of the Taff and Ely Rivers. Its northern boundary follows 

 the county line till within a mile or two of the River Rhymney ; and 

 the eastern boundary runs over Gelligaer Hill nearly to the church ; 

 thence to Eglwysilan Hill, keeping a sinuous line over the summit 

 between Pontypridd and Senghenydd, and so to Caerphilly Common. 

 It then takes the Cardiff Road as far as Whitchurch, and so strikes 

 south-east to Roath and the Bristol Channel. The greater part of 

 the area is on the coal measures, but millstone grit, limestone, and 

 a small quantity of old red sandstone occur near Merthyr Tydfil, 

 and a band of limestone again at Taffs Well and along the line of 

 hills which continues through district 9 past Llanishen. The 

 Rhaetic beds, lias, and old red sandstone all appear in the country 

 north of Cardiff, and the gravel drifts cover considerable areas in 

 the same district. 



9. Rhymney : A very narrow strip lying between district 8 and 

 the Rhymney River. The greater part is on the coal measures; 

 but the lower part from Caerphilly downwards comprises the 

 limestone hills of Llanishen and Rudry, the underlying old red 

 sandstone, a small area of the Ludlow beds about Penylan and 

 Roath, and a considerable acreage of gravel drifts, as well as the 

 interesting marshes at the mouth of the Rhymney River. 



The chief authorities quoted for records are : 



Ray : John Ray's Cat. Plant. Angl. 1670, Synopsis 3rd edit. 



1724, and account of his Third Itinerary in 1662 (edited in 



the 'Memorials of John Ray/ by Edwin Lankester). 

 Light f. : The Rev. John Lightfoot's Journal of a Botanical 



Excursion in Wales, 1773 : printed in Journ. Bot. 1905, pp. 



297-306. 

 B. G. & N. B. G. : Botanist's Guide, 1805 ; and New Botanist's 



Guide of 1835 (with Supplement 1837). 

 Nicholson : Nicholson's Traveller's Cambrian Guide, 1840. 

 Wats. Outlines : Outlines of the Geographical Distribution of 



British Plants, 1832, by H. C. Watson. 

 Flower, T. B. : Catalogue of Swansea Plants, Mag. Nat. Hist. iii. 



(1839) pp. 561-4. 

 Wats. MSS. : Manuscript material for Topographical Botany, 

 preserved in the Botanical Department of the British Museum 



(Natural History). 

 Wats. Geogr. Distr. : Geographical Distribution of British Plants, 



1843, by H. C. Watson. 

 Gutch: J. W. G. Gutch's list of plants near Swansea, in 



Phytologist, vol. i. (1841 and 1842). 

 Flower S Lees : List supplementary to the preceding, by T. B. 



Flower and Edwin Lees, Phyt. vol. i. (1842) 377. 

 Westcombe, Thomas'. List in Phyt. i. 780 (1843). 

 Mogyridge, Matthew : List in Proceedings of Royal Institution of 



South Wales, 1844. 

 Dillwyn, L. W. : Materials for a Fauna and Flora of Swansea, 



1818. 



