312 71. AMENTIFERS. 
992. Alnus glutinosa, Linn. 
Provinces all. Native. Wild in the Hebrides? 
Lat. 50—59. Cornwall, Wight, Kent. — Skye, Sutherland. 
Zones 123 ? Highlands to 550 yards. Tyne to 400 yards. 
Census 18 35 90. Ireland 12. British type of distribution. 
Europe all, except Lapland and Finmark. 
Russia 65432. West-asia. Siberia. “Japan.” 
Algeria. — [America. Columbia.] 
993. Betula alba, Linn. 
Provinces all. Native. Segregates included. 
Lat. 50—60. Cornwall, Wight, Kent. — Sutherland, Orkney. 
Zones 12845. Highlands to (9002), 680, 670, 660, 630 yds. 
Census 18 36 88. Ireland 12. British type of distribution. 
Europe all. B. ‘glutinosa’ and ‘ pubescens’ included. 
Russia 6-4 321. West-asia. Siberia. Davuria. Kamtsc. 
— Iceland; Hooker list, from Zoega. ‘ America.” 
994. Betula nana, Linn. 
Provinces ---------- 11-13 14151617. Native. 
Lat. 55—59. Lanark, Peebles, Cheviotland ? — Sutherland. 
Zones -- 345. Highlinds to 920, 700, 650, 640, 600 yards. 
Census 6 9 12. Ireland 0. Highland type of distribution. 
Europe - ita - aus ger fra - - - got nor swe lap fin. 
Russia---321. West-asia. Siberia. Davuria. Kamtsc. 
— Iceland. Greenland. America. Columbia. 
995. Populus alba, Linn. 
Provinces 1 to 16, wild or planted. Native in England? 
Lat. 50—58. Cornwall, Dorset, Sussex. — Cantire, Forfar. 
Zones 1 2. Low grounds. N.B. provinces given as reported. 
Census 16 ? ? (Ireland). English type of distribution. 
Europe spa ita tur aus ger fra cha (net) den got (nor swe). 
Russia 65 4 3. West-asia. Siberia. Kamtschatka? 
Algeria. | N.B. Impossible to fix the native area in Britain. 
