i6o The Flora of Glamorgan, 



87. Lemnacese, 



Lemna, Linn. 442. 



1566. trisuica, Linn. Ivy-leaved Duckweed. 

 Local. Abundant. Native. Lacustral. 



Swansea. E. F. Linton. J. of B. 1890. p. 157. Very- 

 common about Cardiff ! J.S. Glyncornel, etc. Fl. Rhondda. 

 Penarth ; Wrinstone ; etc. H. Colwinstone ; Efail Isaf. Miss B. 

 Fairwater. V. Margam to Aberafan Moors ; Flemingstone Moors. 

 Ridd. Grangetown! Leckwith Common ! E.Moors! St.-y-Nyll! Ed. 



1567. minor, Linn. Lesser Duckweed. Bwyd hwyaid, neu Llinhad y 



dwr Ueiaf. 

 Common. Abundant. Native. Lacustral. 



1568. gibba, Linn. Gibbous Duckweed. 

 Local. Abundant. Native. Lacustral. 



Common, near Cardiff ! etc. J.S. Canal in Aberdare Valley. 

 Ridd. Grangetown, 1891 ! U.C.Hb. Duckweeds are used by me 

 every year for teaching purposes, and this species is collected about 

 as frequently as the preceding one. It may, nevertheless, as the 

 actual records suggest, be rare outside the Cardiff area. Ed. 



1569. polyrrhiza, Linn. Greater Duckweed. 

 Rare. Scarce. Native. Lacustral. 



Common in all the reens on the moors, etc. /.5. Blaenycwm, 

 etc. Fl. Rhondda. Very doubtful records ; no one else seems to 

 have been abl<i to secure a single specimen in these localities. Ed. 

 Port Talbot and Margam Moors. Ridd. 



Wolffia, Hork. 443. 



1570. Michelii, Sclileid. Rootless Duckweeil. 

 Rare. Scarce. Native. Lacustral. 



Near Roath Dock, rare. J.S. Abundant in roach ponds, 

 Penarth Road ! ! 30-5-99. Specimens in U.C.Hb. 



88, Alismacese. 



Alisma, Linn. 444. 



1 57 1. PlantagO-aquatica, Linn. Greater Water Plantain. Dyfr Lyriad 



mwyaf. 

 Common. Abundant. Native. Paludal. 



1572. ranunculoides, Linn. Lesser Water Plantain. Dyfr Lyriad 



bychan. 

 Local. Frequent. Native. Paludal. 



Sketty Bog, near Swansea. L.W.D., B.G. Singleton ; Cromlyn 

 Bog ; Tennant's Canal (credited to Moggridge) ; near Coedyrallt 

 (Dillwyn). Gutch. Phyt. 1842. p. 180. St. Hilary; Eglwys 

 Brewis ; St. Athans. J.S. Llynfach. J.S. (2). Porthcawl. N. 

 Kenfig Pool ! H. and W.C. Oxwich. Miss Nicholl and Miss S. 



