in their Influence on Vegetation. 355 
Betula odorata Bechst. (alba L. var.) Birch. Greenland, 61°, 
shrub. Iceland, 65°, shrub to 10 feet high. Britain, 59°. 
Norway, 70° 50’. Peninsula Kola, 69° 30’.2. Peninsula Kanin 
67°, to the Obi river 66°, and from the river Kolyma 68°, to the 
Deroghian Gulf 638° and Kamtschatka; on this peninsula it is 
a large tree 
Quercus pedunculata Kbrh. (Q. robur L. var.), Common Oak. 
England, 58°. Norway, wild, to 62° 55’: cult. 65° 54’. Fin- 
land, coast, 61° 30! (Bjorneborg). St. Petersburg, Taroslav, 
erm, 58°. 
Laria Europea DeC. (including L. Sibirica Ledeb and L. Dahu- 
rica Turez), Common Larch. Norway, Huropwa DeC. 66° 5’; 
Dahurica Turez. 59° 55’; both cultivated. Onega river, White 
Sea, S. W. shore of Onega Lake, Mesen (Peninsula Kanin), 67°. 
Petschora river, 67° 30°... Ue al mountains, 67° 15’. Kora 
river, 68°, northern limit in Europe. Yenisei river, 70°. 
ganida river, 71° 15’. Chatanga river, 72° 30’, most soriheen 
limit of trees on the globe. Anabar. a. Oleneh and Lena, 
72°. Yana, 71°. Yndigirba, 70° 45’. Kolyma, 69°. Anadyr, 
65°. Between Ochotsk and Gishiga, 61°. Peninsula Sachalin, 
49°. To Yeddo and the island Kunaschir, 48° 45’. On the 
shores of Kamtschatka the larch is nowhere to be found; in 
the valleys of this beh Pets however, protected from sea-winds, 
Pyrus Malus i, ee le. Shetland Isles, cult. Britain, 57°. 
Norway, cult., 65° 28’; wild, 63° 40’. Gulf of Bothnia, 63° 
45’, cult. Finland, 63 ° cult: 60° wild. Northern shore of 
Onega Lake, cult. Narva, 59° 30’, wild. Twer, 56° 45’, wild. 
Nishny Novgorod, 56°, wild. Kasan, 56°, wild. Southwest 
of Orenburg, 50°. Kopal, Asia, 45° 
Fagus sylvatica L., Common Beech. Britain, 58°. Norway 
59°, cult. 67° 56’, Sweden, 57°. omesaas ‘Poland. §. W. 
Russia. Krim. Caucasus. Pers 
Castanea vesca Geertn., Ohestaut "South Britain. Germany 
(to the island of Riiyen). Austria. Caucasus. 
Populus alba L., Abele Tree. Britain, 56°, wild and cult. 
baleled cult., 67° 56’. Gere wild ‘and cult. a 
ae Hei L., Aspen. Britain, 59°. Norway, 70° 37’. 
Russia. Peninsula Kola, 69° 30’. Eastern shores of the White 
ea, 66°. Yenisei, 66°. Kolyma river, 67° 30’.°. Amur river. 
Alnus ineana W., Hoary: -leaved Alder. Canada. Norway, 
? Thid., p. 5 _— ha 575. 
- Middondortf Sibirische Reise, Bd. IV, Th. I, p. 53 
5 Middendorff, p. 573. 
Am. Jour. Scr.—Turrp Serres, Vou. XXVIII, No. 167.—Nov., 1884. 
ae 
