460 SALICACEAE 



Burghfield. Aldermaston. Ufton. Crookham Heath. New- 

 bury Wash. Snelsmore. Inkpen. 

 5. Loddon. Heath Pool, Penny. Sunninghill, var. fusca, J. G Biiker, 

 Bearwood. Bagshot Heath. Early. Broadmoor. Risely. 

 Jouldern's Ford. Finchampstead. Ascot. Sandhurst. East- 

 hampstead Plain. Whitemoor Bog. Bracknell. Sunningdale. 

 Anibarrow. Haines Hill. 

 On our Berkshire heaths I have found forms of S. repens which 

 agreed with named specimens of S. adscendens, Sm. E. B, t. 1962 ; 

 -S. parvi/olia, Sm. t. 1961 ; S. argeniea, Sm. Fl. Brit. 1059; and S. fusca, 

 Linn. Sp. PI. 1020; and Mr. Britten reports prostata from Greenham 

 Common. Experts now consider these species to be forms only. 



S. repens is recorded for all the bordering counties except E. Glouces- 

 tershire, but it is very rare in Oxfordshire, in which county I have 

 not as yet seen it. 



X S. ambigua, Ehrh. Beitr. vi. 103 (1791). S. repens-aurita, Wimm. 



Sal. Eur. 233. 

 Top. Bot. 376. Syme, E. B.viii. 244, t. 1355. Fl. Oxf. 275. Comp. Cj^b. 

 Br. 570. 



This hybrid willow is found occasionally in the Kennet and Loddon 

 districts. At Greenham a form was found which was nearer S. repens. 

 At Bearwood an intermediate plant was noticed, and at Finchampstead, 

 where a hybrid much nearer S. aurifa also occurred. Near Bracknell 

 a form nearer S. repens was seen. 



Mr. H. C. Watson in Top. Bot. says he believed he had seen S. amhigxia 

 on the heaths of Berkshire. 



[S. NIGRICANS, Sm. in Linn. See. Trans, vi. (1802) 120. Syme, E. B. viii. 241, 

 t. 1347. See Fl. Oxf. 275. 

 Planted by the Cherwell and Christ Church Meadow, Oxford.] 

 Other non-indigenous species of Willows are planted about Oxford, and 

 the Weeping Willow, S. Babylonica, Linn., is also to be seen in parks, orna- 

 mental grounds, &c. 



POPULUS, Linn. Gen. n. 996 (Tournefort, Inst. t. 365). 



*P. ALBA, Linn. Sp. PL 1034 (1753), and of Gerard. JVJiite Poplar. 



Comp. Cyb. Br, 312. Syme, E. B. viii. 192, t. 1299. Nyman, 663. Fl. Oxf. 268. 

 Denizen. Sylvestral. Woods, hedges, fields, &c. Not very common, biit 



occurring as a planted tree in all the districts, preferring low moist 



situations. March-April. 

 First record. P. alba, 3Iavor^s Agr. Berks, 1809. 



1. Isis. Buckland. Buscot. Cumnor. Wytham. 



2. Ock. Boar's Hill. Uffington. Abingdon. 

 B. Pang. Sulham. Standforcl Dingley. 



4. Kennet. Mortimer, Tufnail. Neichury Cat. 1839. Aldermaston. 



5. Loddon. Park Place, by the Lake, Stanton. Euscombe. Windsor. 



Sandhurst. . 



P. alba occurs as a planted tree in all the bordering counties. 



