52 CRUCIFERAE 



our local forms, as he thought that these might throw light on the 

 mutual infertility which he considered closely allied species must 

 possess if the species were not to be broken down. His premature and 

 lamented death, however, prevented this line of research being fol- 

 lowed up, but so far as my experiments went they proved the 

 constancy of two or three of our local forms. 



It is quite certain that the figures in Jordan's Icones do not exhaust 

 the forms which are to be found even in a single county. I have 

 been able to identify E. majuscula, a large form often occurring in 

 sandy arable fields, as at Inkpen and near Lechlade, E. stenocarpa on 

 walls at Kennington, E. Bardini from Binsey and Wytham, and 

 E. Ozanoni from Shrivenham. These belong to the long-fruited group, 

 but the last plant has the fruit rather bi'oader than the plant in 

 Schultz' Herb. NormaJe. Of the broad-fruited forms I have been able to 

 identify the true E. brachycarpa and E. spathulaefolia, the latter having 

 broad, large, subentire leaves; this also occurs at Wytham and 

 Binsey. 



I cannot claim certainty for the foregoing determinations, as with- 

 out type specimens it is most difficult in such critical forms to be 

 certain of the correct identification. 



E. praecox, DC. Syst. ii. 357 (1821). 



E. brachycarpa, Jord. Pugill. 9. Draba verna, var. brachycarpa, Tenore. 



Draba praecox, Stev. in Mem. Soc. Nat. Moscow, iii. (1812) 269? 

 Comp. Cyb. Br. 481. Syme, E. B. i. 190, t. 134, f. 2. Fl. Oxf. 33. 



Nyman, 54. 

 Native. Rupestral. Walls. Locally common. A. Februaiy-May. 

 First record. E. brachycarpa. The author in Rep. Bot. Rec. Club, 1880 ; 



see also Fl. Oxf. 33, 1886. 



1. Isis. Cumnor, Ih-uce in Herb. Brit. Mus. Wytham. Buckland. 



Botley road in Berkshire. 



2. Ock. Cherbury Camp. South Hinksey. Marcham. Besilsleigh. 



Dry Sandford. Kennington. 

 5. Loddon. Early Heath, Tufnail. 



E. praecox is recorded for all the bordering counties except E. Glouces- 

 tershire. 



[Error. Draba inflata. Found plentifully on a bank opposite to Reading 

 Castle, April 27, 1855, by //. A. S. [Stowell] in Fhyt. (1856) 334. This was 

 possibly a form of E. praecox, certainly not the true E. inflata. By ' Reading 

 Castle ' Reading Abbey was probably meant. There is now no Reading Castle.] 



COCHLEARIAj.Linn. Gen. PL n. 720 ^Tournefort, t. loi). 

 C. Armoracia, Linn. Sp. PI. 648. Horseradish. 



Armoracia rusticana, G. M. Sch. Fl. Wett, ii. 426 (1800 1. Roripa rusii- 

 cana, Gren. & Godr. Fl. Fr. i. 27. Raphanus i-usticana, Gerard, 187 



