176 REPORT OF THE CONFERENCE ON GENETICS. 
Rumex crispus x nemorosus 
On the Eschenberg, according to Siegfried. 
conglomeratus x crispus 
Near Walkenweier, according to Siegfried. 
alpinus x obtusifolius 
Enzeindaz and Pilatus, according to Haussknecht. 
Polygonum lapathifolium x Persicaria 
Papon, near Villeneuve. 
Hydropiper x Persicaria 
x mite 
Bistorta x viviparum 
Near Chur. 
Gremli, ‘ Swiss Flora.’ 
Betula alba x B. nana (B. alpestris) 
Common in the Jura, in Scandinavia, and in the 
north of Russia. 
Kerner, ii. p. 586. 
A long list of the hybrids in this genus is given in Gremli, ‘‘ Swiss 
Flora,’ English translation from fifth edition by Paitson, p. 354. 
Salix grandifolia x S. purpurea (S. austriaca) 
Kerner, list, vol. ii. p. 586. 
incana x §. daphnoides 
Island on Danube, near Diirenstein. 
Kerner, ii. p. 577. 
Orchis incarnata x palustris 
laxiflora x Morio (O. alata) 
x palustris 
mascula x pallens 
militaris x Aceras (O. spuria) 
x purpurea (O. hybrida) 
x tephrosanthos (O. Beyrichii) 
globosa x Gymnadenia conopsea (O. valesiaca) 
purpurea x tephrosanthos 
tridentata x ustulata (O. Dietrichiana) 
Morio x palustris 
Gymnadenia odoratissima x Orchis maculata 
x albida (G. Strampfii) 
Gremli, “ Swiss Flora.” 
conopsea X Nigritella nigra (N. suaveolens) 
Common in the Central Alps. 
-} 
Kerner, ii. p. 586. 
TNigritella angustifolia x Gymnadenia eonopsea (N. fragrans) 
x odoratissima (N. suaveolens) 
Ophrys aranifera x muscifera (O. apiculata) 
fuciflora x muscifera (O. devenensis) 
Gremli, ‘“ Swiss Flora.’’ 
tEpipactis rubiginosa x Cephalanthera alba (Epipactis speciosa) 
Erlafthal of Lower Austria. 
Kerner, ii. p. 5838. 
Polygonatum multiflorum x officinale 
