88 ALSINACEAE 



L. clioica usually occurs 'on damp soil, and is most plentiful at the 

 junction of two geological formations, the lower one of which is 

 a clay, so that at the junction of the Coralline Oolite with Oxford Clay, 

 or the Greensand with the Gault, a beautiful display of the plant is to 

 be found if the country be at all wooded. 



L. dioica occurs in all the bordering counties. It may be worth 

 mentioning that this abundant plant of Berkshire and Oxfordshire is 

 one of the rarest ingredients of the Cambridgeshire Flora. 



li. alba, Miller, Gard. Diet. ed. 8 (1768). White Campion. 



L. vespertina, Sibth. Fl. Ox. 146 (1794). Silene pratensis, Gren. andGodr. 

 Fl. Fr. i. 216. Melandrium jyralense, Roehl, 1. c. 

 Top. Bot. 67. Syme, E. B. ii. 67, t. 210. Nyman, 86. Fl. Oxf. 48. 

 Native. Agrestal. Hedges, cultivated fields, commons, &c. Common 



and generally distributed. B. or P. April-October. 

 First record. L. vespertina, Russell's Cat. 1839; without locality. 



Often found with pink flowers (as at Frilford, Dyer), but, so far 

 as my observation goes, almost entirely when L. dioica is in the 

 vicinity. 



Ii. DIOICA X ALBA. Undoubted hybrids of the two plants have 

 been noted in the Isis division near Ashbury, in the Ock district near 

 Culham Cutting, near Frilford, Cothill, Eadley, Bagley ; in the Pang 

 district at Bradfield ; at Hodcott in the Kennet and in the Loddon 

 district near Finchampstead ; in all these cases L. dioica was growing 

 with L. alba. In the Culham Railway Cutting, which is in Oxford- 

 shire, there is a most beautiful growth of L. clioica, and in the arable 

 fields, which are close by, pink-flowered L. alba may almost always be 

 found. On the upland chalk fields, where L. dioica is absent, L. alba 

 is almost invariably white, but in the valley of the Pang, where 

 L. dioica again appears, L. dioica x alba is again found. Specimens 

 from near Bradfield College were distributed through the Bot. Exch. Club 

 in 1892, by the author.' 



L. alba occurs on the top of Walbury Camp at 959 feet, and is 

 found in all the bordering counties. 



The red-flowered plant is the Melandrium pratense, var. incarnatum, 

 Lamotte, Fl. du Plateau, 131. 



Ii. Flos-cuculi, Linn. Sp. PI. 436 (1753. Ragged Robin, Wild Williams, 

 Meadow Pink. 



Flos-cuculi praiensis, Trag. (1552). Armoraria pratensis mas, Ger. Em. 

 600. Coronaria Flos-cuculi, A. Br. in Flora, xxvi. (1843) 368. 



Top. Bot. 67. Syme, E. B. ii. 71, t. 212. Baxt. t. 71. Nyman, 85. 



Fl. Oxf. 47. 

 Native. Paludal. Wet meadows, woods, and osier holts. Common 



and generally distributed. P. April-October. 



