SISYMBRIUM 55 



Fiist record. Hedge Mustard, near Ockingham, Spencer's Complete British 



Traveller, 1771. Erysimum officinale, Dr. Noehden, Maror's Agr. Berks, 



1809. Very plentiful about Blewbury, &e., Mr. J. Lousley in 



Bussell's Cat. 1839. 



This species is one of our most widely distributed weeds, and may be 



found by our dustiest and most sunny roadsides. Notwithstanding the 



wide range of habitats, the plant is not very variable, but two varieties, 



based on the fruit being hairy or glabrous, are described ; the former 



is the one almost universally found in the county ; the latter may 



have been introduced. 



Var. LEiocARPUM, Guss. Fl. Sic. Syn. 188, and DC. Syst. ii. 460. 



Described by Jordan in the Diagnoses, 139, as a species ; he cultivated 

 it from seeds sent him by Todaro from Sicily, and found certain 

 chai-acters were constant. He says it differs, not only in the glabrous 

 siliquas, but in the longer style and shorter seeds. It occurs by the 

 railway near Reading, and near Sandhurst, and Mr. A. B. Jackson has 

 seen it near Newbury. 



Spencer's record of Hedge Mustard may possibly have meant Arabis 

 perfoliata, as it would have been scarcely necessary to have given a 

 locality for such a common plant as S. officinale, which is found in all 

 the bordering counties. 



**S. POLTCERATiuM, Linn. Sp. PI. 658 (1753). 



Comp. Cyb. Br. 484. Syme, E. B. i. 144, t. 97. Nyman, 44. 

 Alien. Casual. On ballast by the railway at Didcot. 



S. Sophia, Linn. Sp. PI. 659 (1753). Flixiceed. 



Sophia Chirurgorum, Gerard, 910. Sophia, Brunfels. 

 Top. Bot. 46, Syme, E. B. i. 145, t. 98. Nyman, 43. Fl. Oxf. 29, 



Native. Viatical. Waysides, sandy fields. Local and rare. A. 

 June-August. 



First record. Sophia. Upon olde walls about Oxford everywhere, 



MS. in Lytes Herhall, 1660. 



1. Isis. About Wytham Mill. 



2. Ock. Botley, Dyer in Rep. of Bot. Exch. Club, 1867. Marcham, 



Walker. Bagley Wood, F. W. Bennett. By waysides and in corn- 

 fields near Cothill and Dry Sandford, where it is probably native. 

 Ferry Hinksey, 1888. Frilford, 1884. Didcot. Casual. 

 4. Kennet. A casual at Newbury railway and cultivated fields near 

 the Workhouse, Newbury, Weaver. 



Mr. Dyer's locality was probably in Oxfordshire. Our plant is the 

 typical form ; the subglabrous form has not been noticed in Berk- 

 shire. 



I have no record for Bucks or Hampshire. 



