192 ROSACEAE 



P. reptans, Linn. Sp. PI. 499 (1753). Common Cinque/oil. 



Quinqnefolium majus repens, C. B. Pin. 325. Q. majus, Gerard, 836. 

 Top. Bot. 133. Syme, E. B. iii. 148, t. 432. Nyman, 226. Fl. Oxf. lor. 

 Native. Viatical. Hedge-banks, roadsides, cornfields, pastures, &c. 

 Common and generally distributed. Prefers dry, sunny situa- 

 tions. P. May-September. 

 First record. P. reptans. Common Cinquefoil, Mavors Agr. Berks, 270, 1809. 



Var. MicROPHYLLA, Trattinick, Mon. Rosac. iv. 80 (1824). A small 

 form occurring in dry soil, which has been seen in all the districts, as 

 at Tubney, Besilsleigh, Lowbury, Ilsley, Wokingham, Cookham, &c. 

 This extreme foi-m, which is stated to retain its characters under 

 cultivation, appears very different from the type, yet apparently united 

 by a chain of intermediates. 



P. REPTANS X siLVESTRis. Tliis hybrid has been noticed at Tilehurst, 

 near Newbury, near Binfield, Early, and Blackwater, but the distri- 

 bution of the PoteniiUa hj'brids is by no means worked out. 



P. reptans occurs in all the bordering counties. 



P. Anserina, Linn. Sp. PI. 495 (1753). Silver Weed, Wild Tansy. 



P. argentina, Huds. Fl. Angl. 195 (1762). Argentina, Gerard, 841. 

 Anserina, Tragus. 

 Top. Bot. 132. Syme, E. B. iii. 149, t. 433. Njanan, 223. Fl. Oxf. loi. 

 Native. Viatical, glareal. Waysides, commons, clayey cornfields, 

 and in depressions on the chalk downs. Common and widely 

 distributed. P. May Septembei*. 

 First record. Sonning, Mr. S. Budge, in Herb. Brit. Mxis. Published in 

 Mavor's Agr. Berks, 1809. 



Var. SERiCEA, Koch, Syn. Fl. Germ. 213, which has both sides of the 

 leaves covered with a silvery pubescence, is the commoner form, and it 

 is often very luxuriant by our river-banks. Some of the dry valleys 

 on the chalk downs are covered with it so as to be noticeable from 

 a considerable distance, and many of our roadsides are bordered with 

 a copious growth of the plant which, when in flower, forms a pleasing 

 object ; it is also conspicuous in the grassy rides in woods. 



Var. NUDA, S. F. Gray, Nat. Arr. Brit. PI. 580 ,1821) — var. viridis, 

 Koch, I.e., in its extreme condition is a very different form, having 

 one or both surfaces of the leaves nearly glabrous ; it is usually found 

 in damp grassy places, especially on goose greens, as at Cookham, 

 Abingdon, Marcham, Hungerford, Newbury, Twyford, Kennington, 

 Mortimer, &c. 



Var. GLABRATA, Sondcr, Fl. Hamb. 290, is a closely allied form, being 

 a small nearly glabrous plant with elegantly cut leaves, which occurs 

 at Bowsey Hill, Bray, in the Sandford and Ifflej- meadows, &c. These 

 three plants are not true varieties, but simply forms of one species 



