Ar.ENARIA 97 



Top. Bot. 76. Syme, E. B. ii. 112, t. 243. Nyman, 117. Fl. Oxf. 55. 

 Native. Glareal. rupestral. Dry sunny places on stony ground and 



wall-tops. Local and rare. A. May-July. 

 First record. Streatley, Mr. H. C. Watson, in Britt. Contr. 1871. 



2. Ock. Cothill, on the village walls. Kadley, on the ground near 



the Station. 



3. Pang. Streatley, Watson, 1. c. Moulsford, on walls in village. 

 5. Loddon. On walls near Euscombe. 



A. tenuifolia is found in all the bordering counties. 



The genus Arenaria, as defined in the Genera Plantarum of Bentham 

 and Hooker, is too unwieldy, and I should prefer to follow Nyman 

 and other continental authorities in dividing it. 



A. trinervia, Linn. Sp. PI. 423 (1753). Planiain-leaved Chickweed. 

 A. trinervis, Sm. Fl. Brit. ii. 478. Moehringia trinervia, Clairv. Man. 

 150 (181 1). Alsine Plantaginis folio, J. Bauhin, Hist. iii. 364. 

 Top. Bot. 77. Syme, E. B. ii. loi, t. 234. Nj^man, 112. Fl. Oxf. 55. 

 Native. Sylvestral. Woods, shady hedgerows, thickets, &c. Generally 



disti-ibuted. A. April-June. 

 First record. A. trinervia, Dr. Noehden, Mavor's Agr. Berks, 1809. 

 This occurs in shaded places, especially in woodland situations 

 in all the districts, and is a fairly common plant. I have seen 

 it in Sparsholt Enclosure on the Kidgeway, which is over 600 feet 

 above the sea. 

 A. trinervia, the petals of which vary in length, occurs in all the 

 bordering counties. 



Nyman and other authorities place it in the genus Moehringia. 



A. serpyllifolia, Linn. Sp. PI. 423 (1753). Thyme-leaved Sandwort, Least 

 Chickweed. 

 Alsine minima, Ger. Em. 612. A. sphaerocarpa, Tenore, Syll. Fl. Neap. 

 iv. 222. 



Top. Bot. 76. Syme, E. B. ii. 102, t. 235, Nyman, 115. Fl. Oxf. 54. 



Native. Agrestal, glareal, rupestral. Walls, cornfields, sandy heaths, 

 &c. Generally distributed and a very common plant. A. March- 

 October. 



First recorded in Russell's Cat. 1839, without special locality. Also given 



as frequent on walls, Marlow, by Mr. G. G. Mill in Phi/t. i. 984, 1843. 



A form which occurs on the dry heaths of the southern part of the 



county is more glandvilar, but it is not quite identical with var. 



glutinosa, Koch, Syn. Fl. Germ. 117 (1837). 



A. serpyllifolia, which ascends to the top of Walbury Camp, 959 feet 



above the sea, occurs in all the bordering counties. 



A. leptoclados, Guss. Fl. Sicil. Syn. ii. 284 (1845), not of Boissier. 

 A. serpyllifolia, var. leptoclados, Fl. Oxf. et auct. var. 



H 



