440 URTICACEAE 



said to be noxious to sheep and to dye blue. About Oxford 

 with Uredo cortfluens, Grev., Baxt. Phaen. Bot. n. 143, 1835. It occurs 

 on Walbury Camp at over 900 feet elevation. 



A very narrow-leaved form of the female plant was found in a wood 

 near Cumnor. 



M. perennis is found plentifully in all the bordering counties. 



*M. annua, Linn. Sp. PL 1035 (1753). French Mercury. 



Top. Bot. 366. Syme, E. B.viii. 115, t. 1269. Nyman, 647. Fl. Oxf. 260. 



Colonist. Agrestal. Waste and cultivated ground in rich soil. 

 Very local and absent from the north of the county. A. July- 

 September. 



First record. On the loop railway line just below Eeading, Mr. F. 

 Tufnail in the Flora of Oxfordshire, 1886. 



4. Kennet. Eeading railway, as above. Casual on the railway at 



Newbury one year only, 



5. Loddon. Near Windsor, Everett. Finchampstead, in a cornfield. 



Hurley, Common in garden and arable ground at Bisham. 

 M. annua, which is only the merest casual in Oxfordshire, is recorded 

 for all the other bordering counties except East Gloucestershire. I have 

 seen it at Marlow in Bucks. 



UETICACEAE, Reichb. Consp. 83 (1828). 



ULMACEAE, Mirbel, Elem. ii. 905 (1815). 



ULMUS, Linn. Gen. 281 (Tournefort, Inst. t. 372). 

 U. campestris, Linn. Sp. PL 225 (1753), and Herb. ^ Wych Elm. 

 U. inontana, Stokes in With. Bot. Arr. ed. 2, i. 259 (1787^. Sm. E. B. 

 t. 1887 (1808). U. glahi-a, Huds. FL Angl. 95 (1762), not Miller. 



Top. Bot. 368. Syme, E. B. viii. 141, t. 1287. Nj-man, 659. Fl. Oxf. 263. 

 Native or denizen. Woods and hedges. Tree. March-April. 

 First record. The variety called the Wych Elm grows to a very large 

 size in the vicinity of Newbury, Mavor's Agr. Berks, 1809. ^- ''^oijor, 

 Dutch Cork-barked Elm. Common in many places, generally 

 planted in streets and waste places, and before houses, &c., as 

 at Aston [Tirrel], Mi\ Lousley in Bussell's Cat. 

 In Berkshire, where it is scattered through the county chiefly in the 

 vicinity of dwellings, the Wych Elm has less of the character of a 

 native tree than U. sativa. It is very difficult to speak with definite 

 knowledge as to the indigenity of many of our British trees in their 

 pi'esent habitats. In Berkshire it is too frequent to require a list of 

 localities. 



^ I have followed Prof. A. von Kerner in using this name for the Wych 

 Elm. See Schedae ad Floram Exsicc. Austr.-Hung. i. 98. 



