hence in going northward, or in ascending a mountain, we far oftener meet with stunted forms, due to the DIRECTLY injurious action of climate, than we do in proceeding southward or in descending a mountain.
horregatik iparralderantz goazenean edo mendi batera igoten garenean, askoz sarriago topatzen ditugu forma alferrik galduak, klimaren eragin artezki kaltegarriaren ondorioz, hegoalderantz goazenean edo mendian behera gatozenean baino.