URTICA 443 



H. lupulus, In hedges frequent, Mavor's Agr. Berks, 1809. 

 Humulus Lupulus, which was formerly cultivated in considerable 

 quantities in Berkshire, is found in all the bordering counties. 



**Cannabis sativa, Linn. Sp. PI. 1027 (1753). Hemp. 



Comp, Cyb. Br. 559. Syme, E. B. viii. 131, t. 1280. Nyman, 658. Fl. Oxf. 263. 



Alien. Casual. Waste ground about towns. Rare. A. August. 



1. Isis. Near Wytham Mill. 2. Ock. Grandpont. Didcot. 



3. Pang. Near Reading, on railway ballast by the G. W. and S. E. 



Railway. 4. Kennet. At Newbury. 5. Loddon. Twyford. 



Maidenhead. On rubbish in Windsor. Not permanently established, 



but only springmg up from seed accidentally dropped, or from the 



cleanings of bird-cages. 



URTICA, Linn. Gen. n. 935 (Tournefort, Inst. t. 308). 



**U. piLULiFERA, Linn. Sp. PI. 983 (1753). Roman Nettle. 



Comp. Cyb. Br. 559. Syme, E. B. viii. 129, t. 1280. Nyman, 657. 

 Alien. A very doubtful plant of Berkshire. A. July - Augiist. 



' Roman Nettle, U. pilulifera, Dr. Noehden, rubbish heaps', Mavor's Agr. 

 Berks, 1809, but as U. urens is not given. Dr. Mavor probably intended the 

 common U. urens. The U. pilulifera of the Well. Coll. List is, the Rev. C. W. 

 Penny tells me, also U. urens. I have been told that Mr. Butcher, of Reading, 

 found U. pilulifera at Silchester. I have not seen the specimen, but the 

 locality is one likely to produce it. The locality was probably in Hampshire, 

 since the Amphitheatre is the only portion of the Roman Silchester which is 

 in Berkshire. Mr. Tiifnail has specimens from an old garden in Reading, 

 and it is recorded tor Hants and Surrey. 



TJ. dioica, Linn. Sp. PI. 984 (1753). Stinging Nettle. 



U. major, Brunfs. U. urens, Ger. 570. 

 Top, Bot. 367, Syme, E. B. viii. 127, 1279. Nyman, 657. Fl. Oxf. 262. 

 Native. Viatical. Waste places, hedges, woods, &c. Abundant 



tliroughout the county. P. July- August. 

 First record. Sonning, Mr. S. Rudge in Herb. Brit. Mus. 1800. U. dioica, 

 Mavor's Agr. Berks, 1809. 



The Nettle is a very abundant plant in some of our low-lying shady 

 woods. From its occurrence in many different situations it is subject to 

 considerable variation. Among these may be mentioned — 



Var. ANGUSTiFOLiA, Wimm. et Grab., Fl. Siles. 1827-9, Eeichb. Ic. Fl. 

 Germ, et Helv. 12, t. 654, f. 1324. 



Kingston Bagpuze. Eadley. Very luxuriant in shady thickets near 

 Tidmarsh. Wargrave. Some of the plants from Tidmarsh appeared 

 to be allied to the var. atro-virens of Gren. & Godr. Fl. Fr. iii. 108, but 

 I have been unable to compare them with a type specimen. 



Var. HOLOSERicEA, Fries, Nov. Fl. Suec. ed. 2, 281, to which a tall, 

 robust, narrow-leaved, strongly hairy plant from Sulham probably 

 belongs. Reichb. 1. e. 



Var. MiCROPHYLLA, Hausmann, Fl. Tirol, ii. 771 (1852), a small-leaved 

 dwarf plant from the stonework of river-banks near Oxford. 



In fields near Tidmarsh a form occurred with leaves deeply and 



