294 COMPOSITAE 



A form occurred (/n Boar's Hill and at Chawley, near the brickyards, 

 which is possibly a hybrid of this species with S. Jacobaea. A nearly 

 glabrous form (/. glabra) also occurred there and near Bagley Wood, in 

 which the leaf-segments are much broader than usual. 



S. erucifolius occurs in all the bordering counties. 



S. Jacobaea, Linn. Sp. PI. 870 (1753;. Common Ragwort, Rctgwort 

 Groundsel. 



Jacobaea vulgaris, J. Bauhin, Hist. ii. 105. 

 Top. Bot. 256. Syme, E. B. v. 85, t. 755. Nyman, 355. Fl. Oxf. 158. 

 Native. Pascual. Pastures, roadsides, heaths, &c. Locally abundant 



and generally distributed. P. June-September, 

 First record. Sonning, Mr. S. Ruclge in Herb. Brit. Mus. 1800. S. jacobaea. 

 Mavor's Agr. Berks, 1809. 



Dr. Mavor says that ' the plant dyes yellow and that animals are 

 not fond of it.' Rabbits, however, eat it, but not until other vegetation 

 is getting scanty. The caterpillar of the Cinnabar Moth is a con- 

 spicuous object on the Ragwort, which is very abundant in the 

 clearing of Wytham Wood, on the dry sandy tract about Besilsleigh 

 and Cothill, on many of the commons on the Tertiaries of the Pang 

 and Kennet districts, and also on the heathy ground of Sandhurst, 

 Ambarrow, and Bracknell. In Windsor Great Park there are also 

 extensive areas occupied by it. 



Var, FLOscuLosus (Jord. Cat. Jard. Dijon, 30 (1848), as a species) ; 

 a discoid form has been seen near Ascot. 



S. Jacobaea occurs plentifully in all the bordering counties. 



S. aquaticus, Huds. Fl. Angl. 317 (1762). Water Ragwort. 



Jacobaea latifolia, palusfris sive aquatica, Ray, Syn. i. 50 (1690). 

 Top. Bot. 256. Syme, E. B. v. 86. t. 756. Nyman, 355. Fl. Oxf. 158. 

 Native. Inundatal. Marshes, meadows, damp roadsides, &c. Rather 

 common and widely distributed in the low-lying districts, but not 

 occurring in such masses as the former species. P. July-Sept. 

 First record. S. aquaiicus, without locality, Russell's Cat. 1839. Wet 

 places, Marlow, Mr. G. G. Mill in Phyt. i. 987, 1843, and as 

 S. aquatilis by Mr. T. B. Flower, in Robertson's Env. of Reading, 1843. 

 The outline of the leaves in this species varies considerably, 

 Var. PENNATiriDus, Gren. et Godr. Fl. France, ii. 115, which has the 

 radical and lower leaves with conspicuous lateral lobes and the upper 

 stem-leaves deeply pinnatifid, is not uncommon ; I have it from Wytham 

 Meadows, Abingdon, Kennington, Radley, Theale, Sonning, &c. 



Var. DUBiA, mihi, achenes of the disk florets slightly hairy, the 

 hairs not confined to the shallow ridges. 



This form is apparently rare, but may be readily overlooked for the 

 ordinary plant, from which it does not appear to differ in other 



