LEPIDIUM 65 



2. Ock. Near Wootton and Childswell Farm, Boswell. Didcot, 



Rev. F. Bennett, Marcham, sub noni. L. Smithii, Walker. Abingdon. 

 Near Bagley. Cothill. Wantage. Didcot. Wittenham. 



3. Pang. Streatley, Pamplin. Bucklebury. Tidmarsh. Tilehurst. 



Heading. 



4. Kennet. Abundant by the railway at Alderniaston and in 



cultivated fields there. Mortimer. Burghfield. Calcot Mill. 

 Newbury. 



5. Loddon. Sonning Cutting, Tufnail in Fl. Ox/. Bridle-path near 



Finchampstead. Wellington College, Penny. Maidenhead, by 



the railway abundant. Wargrave. Haine's Hill. Bracknell. 



Knowl Hill. Twyford. Jouldern's Ford. Haws Hill. Windsor. 



The plant, which prefers sunny situations, occurs in all the bordering 



counties. 



Ii. heterophyllum, Eenth. Cat. PL Pyrenees, 95 (1826). 



Var. CANESCENS, Gren. et Godr. Fl. Fr. i. 150 (1848). L, hirtum, Index 

 Kewensis and Lond. Cat. ed. 9 (1895), not of DC. L. Smithii, Hook. 

 Brit. Fl. ed. 3, 300 (1835) ; ? ed. 2, 297 (1830). 



Top. Bot, 32. Syme, E. B. i. 217, t. 157. Nyman, 65. Fl. Oxf. 37. 



Native. Glareal. Hedge-banks, commons, and roadsides. Local and 



lare. B. or P. July- August. 

 First record. L. heferophyllum, Sonning Cutting, Mr. F. Tufnail in 



Flora of Oxfordshire, 1886. 



3. Pang. Brad field, Jenkinson (I have not seen the specimen). 



Bucklebury, rare. 



4. Kennet. Near Newtown Common, Weaver. 



5. Loddon. Sonning Cutting and Burghfield Meadows, Tufnail, I. c. 



Near Sunningdale. Near Sunninghill. 



Occasionally the siliculas have a few small papillose scales (var. papil- 

 losa), but the glabrous is the more frequent form. 



It is not recorded from Bucks or Wilts, and although recorded from 

 Oxfordshire has not been seen by me in that county, but is found in 

 the other bordering counties. 



*o 



The synonymy of the species is a little involved. In the Index Keicensis 

 the name Lepidium Mrtuvi^ Sm., is made to cover three plants, which a large 

 number of botanists have considered to be distinct species ; one of these is 

 the Thlaspi MHum of Linnaeus, the second is a plant ■which Bentham named 

 L. heterophylluvi, and the third is the above species, which was formerly 

 known as L. Smithii. The first plant, which Linnaeus called Thlaspi hirtum 

 in the Species Plant, is not found in Britain ; it differs from the two latter 

 chiefly in its fruit, which is thickly covered with rather long hairs ; it also has 

 a rather longer style, and the lobes of the silicula are more acute, while its 

 radical leaves, in such specimens as I have seen, are more lyrately cut than 

 in any forms of L. Smithii. The second species, L. heterophyllum, is much 

 more closely allied to our British plant, from which it differs chiefly in its 

 being nearly glabrous ; in fact, Grenier and Godron, in their Flore de 



