The Species of the Genus Larix. 71 
partly being superseded by other kinds of trees. In all 
probability, a similar state of affairs holds good for its distri- 
bution in a southerly direction, where it is nevertheless 
found growing higher up in the mountains: Thus it is 
found forming dense woods at an elevation of 2300 m., and 
can be seen in small groups as high as 2400—2500 m. 
above sea-level (FLAHAULT in Coste: Fl. France, I, 1901, 
and in Rev. Eaux et Foréts, 1901). 
The border-line of distribution in the present paper has 
been drawn in accordance with Curist’s map of the occur- 
rence of the larch in Switzerland (Curist: Pflanzenl. Schweiz, 
1879, Map II), and is continued in an easterly direction 
in conformity with the statements of KERNER and CIESLAR 
(KERNER: Pflanz. Donauländer, 1863, and CıEsLar in Cen- 
tralbl. Forstw. 1904, pp. 2—9). Of these the latter is one 
of the most recent and detailed descriptions of the geo- 
graphical distribution of the European Larch, and is the 
work which has been most closely adhered to here. The 
small area of occurrence north of the Danube near Pögg- 
stall and Jaurling has, nevertheless, been included on the 
authority of KERNERS' positive statement that it grows 
wild in this locality (KERNER: I. c. p. 158). The area of 
distribution in Czeko-Slovakia on the south-easterly frontier 
of Bohemia, and the south-easterly portion of the Sudetic 
Mountains, is drawn according to CIESLAR and HAyEK (HAYEK: 
Die Pflanzendecke Österr. Ung. I, 1916). Hayek remarks, 
that it is hardly possible to define with any degree of 
certainty the area of distribution where the larch grows 
wild, and the same is undoubtedly the case with regard" 
to the other area on the Bohemian frontier. There appears, 
however, to be no doubt that the larch exists in the wild 
