NATURAL HYBRIDS, 175 
V. andriacum x pheeniceum (V. rubiginosum) 
Kerner, list, vol. li. p. 586. 
Linaria striata x L. vulgaris (L. stricta) 
West of Europe, Montpellier. 
Kerner, ii. p. 591. 
*Digitalis ambigua x lutea (D. media) 
Mem.—D. grandiflora and D. purpurea hybridise freely. 
Gremli, “ Swiss Flora.”’ 
Pedicularis gyroflexa x tuberosa 
Monte Generoso 
asplenifolia x Jacquini 
incarnata x recutita (P. atrorubens) 
xX rostrata 
recutita x tuberosa (P. marithiana) 
Jacquini x tuberosa 
rostrata x tuberosa 
Kuphrasia minima x salisburgensis 
Mt. Pilatus. 
ericetorum x salisburgensis 
Chéseret, canton Vaud. 
Gremli, “ Swiss Flora.” 
Acanthus mollis x A. spinosissimus (A. spinulosus) 
Kerner, list, vol. ii. p. 586. 
Mentha nemorosa x rotundifolia (dumetorum) 
rotundifolia x sylvestris (gratissima) 
Gremli, ‘“ Swiss Flora.” 
Micromeria greca x M. Juliana (M. Kerneri) 
Herzegovina. 
Kerner, ii. p. 592. 
Salvia nemorosa x pratensis (S. sylvestris) 
Low country south of Vienna. 
Kerner, ii. p. 589. 
7Prunella laciniata x P. vulgaris (P. hybrida) 
Weinerwald district, Moravia, and Bohemia. 
Kerner, ii. p. 591. 
+Marrubium peregrinum x M. vulgare (M. remotum) 
Flat country by the Theiss and Lower Danube, every- 
where on the plains of $.H. Europe. 
Kerner, li. p. 585. 
Stachys alpina x lanata 
x sylvatica 
Galeopsis angustifolia x dubia (G. Wirtgeni) 
Lamium album x purpureum 
According to Jiiggi, near Rheinan. 
Ajuga genevensis x reptans (A. hybrida) 
Near Munich. 
Gremli, “ Swiss Flora.’’ 
Rumex aquaticus x crispus (R. Patientia) 
Hungary and Bosnia. 
Kerner, ii. p. 592. 
