The Flora of Glamorgav . 137 



1323. aviculare, Linn. Common Knotgrass. Canclwm, Benvr yr iir, 



Gwaedlys, Clymmog. 

 Common. Abundant. Native. Agrestal, viatical, glareal. 



This polymorphic species needs thorough investigation by 

 modern methods. Mr. Riddelsdell records the occurrence of six 

 varieties in the county, viz. :—vars. agrestinum (Jord.), vulgatum, 

 Syme, arenastrum {Bor.), microspermum (Jord.), ntrivagum {Jord.), 

 and littorale (Link). 



1324. Rail, Bab. Ray's Knotgrass. 

 Rare. Scarce. Native. Littoral. 



Near Salt House Point ; near eastern pier. Gutch. Phyt. 1842. 

 pp. 144, 205. Neath. Flower. Ridd. in F. of G. Admitted to Top. 

 Bot. apparently on the evidence of Flower's specimen. Storrie's 

 records clearly refer to littoral forms of the preceding species. 

 Newton. Miss B. Worms Head ; Oxwich ! Horton ! Miss S. 

 Aberthaw. T.H.T. Port Eynon sands and Oxwich sands, but very 

 scarce. Ed. 



The records for 1325, P. maritimum, clearly refer to 1324. 



1326. Hydropiper, Linn. Water Pepper. Tinboeth, Llys y din. 

 Common. Abundant. Native. Inundatal, paludal. 



1327. minus, Huds. Small Persicaria. Clymmog bychan, Treigledlys. 

 Rare. Scarce ? Native ? Inundatal. 



Near the Ferry, Swansea. Gutch. Phyt. 1842. p. 144. Port 

 Talbot. Ridd. 



mite, Schrank. Lax-flowered Persicaria. 



The following two old doubtful records need modern confirmation. 



Swansea. Gutch. Phyt. 1842. p. 144. About Neath and 

 Fabian's Bay. Flower and Lees. Phyt. 1843. P- 3^0. 



1329. Persicaria, Linn. Spotted Persicaria. Elinog goch. 

 Common. Abundant. Native. Agrestal, viatical, inundatal. 



1330. lapathifolium, Linn. Glandular Persicaria. Costog y dom, Llys 



y dom. 

 Local. Abundant. Native. Agrestal, inundatal. 



Although not common, too widely distributed for the citation 

 of the records. Abundant in the valley of the Ddaw, for which 

 district alone Mr. Riddelsdell gives no records. Welsh St. Donats ! 

 St. Hilary ! Lavernock ! Dinas Powys ! 



1 33 1. maculatum. Trim. & Dyer. 



Rare. Scarce ? Native. Viatical. 



Port Talbot ; Aberdare ; Cardiff Docks. Ridd. Railway bank 

 near Riverside ; Penarth. H. Probably almost always an alien. 



1332. ampliibium, Linn. Amphibious Bistort. Canwraidd goch. 

 Common. Abundant. Native. Lacustral, inundatal, even viatical. 



