BUDA 103 



The locality for this plant is sufficiently interesting to be briefly 

 described. It is a flat marshy meadow in the Kimmeridge Clay, on 

 the northern side of which a small spring is thrown out at the 

 junction of the Coralline Oolite with the Clay, and suj^plies water 

 sufficiently laden with saline matter to be perceptibly salt to the 

 taste. On the margins of this stream, which passes in a ditch through 

 the meadow, and especially where they are bare of grass, B. marina, 

 a maritime plant, occurs in considerable abundance. Apium graveolens 

 is the most conspicuous plant by the stream and marks its course 

 through the field. Ranunculus sceleratus and a thick fleshy-leaved form 

 of Atriplex are also found, and the stream itself contains ZannichelUa pe- 

 dunculafa, a form of Ranunculus trichophijllus and Tolijpella glomerata. Among 

 other plants in this meadow may be mentioned Oenanthe Lachenalii, 

 Carex distans, Juncus Gerardi, Sagina nodosa, Sciipus caricis. In the deep 

 ditch, into which this saline spring drains, there is a plentiful growth 

 of Scitpiis maritimus. The general aspect of the field rather recalls 

 one of the meadows in the vicinity of the sea, which are to be seen on 

 the eastern coast. The question arises as to Buda marina being a 

 native plant of Berkshire. It has been suggested that this saline 

 sirring and maritime vegetation may be relics of a time when this 

 part of the Thames Valley was tidal, and that these species may be 

 descendants of a natural maritime flora. My own view is that the 

 maritime species have been conveyed to the meadow by birds, and 

 that their continued existence there is due to its saline nature. The 

 forms of Atriplex and Pobjgonum aviculare, which resemble plants from 

 maritime localities, have been probably evolved from ordinary inland 

 forms. See Rep. Bat. Exch. Club (1892), 359-60, under Corion medium. 



Buda marina is not recorded, so far as I am aware, from any inland 

 locality in any of the counties bordering upon Berkshire. 



The claims for the adoption of Tissa over Buda have been pointed 

 out by Dr. Britton in Journ. Bot. (1890), 295-6. 



[PoLYCAKPON TETRAPHYLLUM, Linn. Syst. ed. 10, 881 (1759). Mollugo tetrajyhylla, 

 Linn. Sp. PI. 89(1753). Syme, E. B. ii. 133, t. 258. 



Eecorded by some unaccountable error by Mr. J. Lousley in Russell's 

 Kewhury Catalogue of 1839 from waste places at Hampstead Norris, East 

 Ilsley, and by Chance Barn, Blewbury. It is a species not in the least degree 

 likely to be found in Berkshire.] 



POETULACEAE, DC, Theor. Elem. 246 (1819). 

 Juss. Gen. 312 (1789). 

 **Claytonia perfoliata, Donn. Cat. Cant. 25 ex Willd. Sp. PI. i. 1186. 

 Alien. Syme, E. B. ii. 137, t. 260. Nyman, 254. Fl. Oxf. 124. 



Miss M. Niven found it outside a garden near Faringdon in 1896. It is 

 included in the Wellington College List, but from a locality which is at Yately 

 in Hampshire ; it is recorded also for Surrey. 



