The Flora of Glamorgan. 193 



1934. clavatum, Linn. Common Clubmoss. 



The records for this species are all doubtful, but are inserted that 

 further search may be made, as it is quite likely to occur in the county. 

 Ed. Head of Swansea Valley. L.W.D. Mat. This may be a 

 Brecknock locality. Ed. " Near Pencoed, Caerphilly ? " J.S. (2). 

 This laote probably refers to information received, rather than to 

 observations made by Storrie. 



The still more doubtful records for L. alpiniim are excluded, 

 though there is no positive reason why the species should not occur 

 about Craig-y-llyn and Cwm Pare. It is recorded from Dunkerry 

 Beacon, Somerset, at 1,668 feet above sea level. 



96. Selaginellacese. 



Selaginella, Spring. 536. 



1926. selaginoides, Gray. Lesser Alpine Clubmoss. Cnwp-fwsogl syth 

 lleiaf. 



Rare. Scarce. Native. Uliginal, rupestral. 



One doubtful record : — Mountains near Glyn Corrwg and Carn- 

 fach. J.S. The only reason for doubting this record is the fact that 

 Mr. Storrie appears occasionally to have transposed the names of 

 species having similar sounds or origins. This species does not 

 otherwise occur south of Merioneth. It is not improbable that the 

 species found by Storrie was L. Selago. 



Isoetes, Linn. 537. 



1927. lacustris, Linn. Lake Quillwort. Gwair merllyn. 

 Rare. Abundant. Native. Lacustral. 



Llynfach ! Mr. Moggridge, L.W.D. Mat. Llyn fawr ! 1892 and 

 1899. U.C. Hb., Ed. 



1928. echinospora, Dur. 



Llyn fawr ! ! 1899. Ed. Both species occur together in Llyn 

 fawr. Plants were brought up from a depth of about 6 feet by 

 Mr. J. J. Neale from a point where they covered the muddy sub- 

 stratum as a pure formation. They were all preserved in alcohol 

 and have been used regularly since for demonstration purposes. 

 Both types of spore occur in this material, and always on different 

 plants. /. echinospora may be the deep water form or species, a fact 

 which would account for its supposed greater rarity. The leaves are 

 certainly longer in this type. Moreover, both the Glamorgan forms 

 differ markedly from Carnarvonshire specimens. Are there three 

 types in Britain ? This species has been recorded hitherto only 

 from Carnarvon, and eight Scotch districts, all N. of the Clyde. 



