23 J: THE JOURNAL OF BOTANY 



trees. — Weston, one tree on roadside between Weston Park and 

 Tilekiln Farm. — Stevenage, meadow of " The Grange." — Stan- 

 steadbury, Ware. — Between Hertford Heath and Brickendon 

 Bury, two or more rows. 



(6) ? . Stansteadbury, Ware. 



So far as Herts is concerned, I have seen no evidence which 

 would lead one to think that the tree is indigenous. 



(2) Beds. J . East of Old Warden Park, a clump of five 

 trees near the stream by the Park gate towards Lower Hill Farm. 



(3) West Suffolk v.c. 26. Clare, a line of trees by the roadside 

 halfway to Poslingford and near Wentford. — Dalham, at the lower 

 end of the village on the right bank of the stream. (See B.E.C. 

 Report, 1912, p. 286.) 



P. CANESCENs X TREMULA C. E. Moss = P. lujhricla Bieber- 

 stein. 



Herts. $ . Grove Road, Hitchin. (Det. C. E. Moss ; see 

 B.E.C. Report, 1912, p. 286.) Girth at 4 ft. from ground 

 4 ft. 4 in., height 40 ft., spread 33 ft. The tree has now lost its 

 top, is being choked by macadam, and is now dying. Scales of 

 catkins like those of P. tremula, 5 mm. long Ijy 2 mm. wide, 

 narrowed into pedicel below, green or pale below, brown of lighter 

 colour than P. tremula in upper middle, with laciniate extremities 

 not so conspicuously long and grey as in P. treimda ; general 

 outline of scale obcuneate. Cupule fairly loose as in P. tremula, 

 not close as in P. alba. Ovary as P. tremula. Styles two, each 

 bifid. Stigmas pink, broader than in P. alba, each division 

 inclining to irregularity, but seemingly proceeding from a linear- 

 subulate plan, and not the wrinkled disk-plan of P. tremula. 

 Colour of stigmas a lighter pink, not of the darker purple of 

 P. tremula. (Notes from fresh specimens in 1912.) 



P. TREMULA L. 



{a) VAR. SERiCEA (Lang ex) Doll = P. villosa Lange. 



(1) Herts. Graffridge Wood, Knebworth. Knebworth Great 

 Wood. Park Wood, Bramfield. Westbury Wood, Ofiley. Roman 

 Road, S.E. of Hertford Heath. 



(2) W. Sujfolk. East Wood, near Whepstead. Shadow Bush 

 Wood, Poslingford. 



(6) VAR. GLABRA Syme. 



Herts. Hitch Wood (det. C. E. Moss), Roman Road, S.E. of 

 Hertford Heath. 



VAR. not determined. 



Herts. Wain Wood, (^ . Crouch Green, near Knebworth. 

 Vicar's Grove Wood, St. Ippolyts. Spinney, S. of Little Wy- 

 niondley, near G.N. Railway, (^ . Box Wood, near Stevenage. 

 Between Purw^ell and Willian, $ . Burleigh Meadows, Langley, 

 near Hitchin. Furzefield, near Hitch Wood, 2 - Lane between 

 Grove Mill and Hyde Mill, Ickleford, 9 • Harmer Green Wood, 

 Welwyn. Knebworth Park, West Gate, $ . Wood near Little 

 Amwell. Between Great Wymondley and Willian, $ . Balls 

 Wood, near Hertford Heath, S.E. side, J . 



