90. EQUISETACES. 419 
1420. Equisetum maximum, Lam. 
Provinces 1 to 16 - [18]. Native. E. Telmateia, Ehrh. 
Lat. 50—58. Cornwall, Wight, Kent. — Skye, Aberdeen. 
Zones 1 2. Humber to 400 yards. Rarely above 200? 
Census 16 380 67. Ireland 8. English-british type. 
Europe spa ita tur aus ger fra cha net den. 
Russia 65 4 8. West-asia. Siberia. 
Algeria. Canaries. Azores. — America. Columbia. 
1421. Hquisetum umbrosum, Willd. 
Provinces - - ----- (8] 9101112131415. Native. 
Lat. 583—58. Lancaster, York. — Perth, Aberdeen. 
Zones 123. Tyne 30—400 yards. Humber to 300 yards. 
Census 7 8 15. Ireland 2. Scottish type of distribution. 
Europe - ita - aus ger fra cha - den got nor swe lap. 
Russia 6-482. “ All Siberia, to 70 lat.” Caucasus; Milde fil. 
— Iceland. America. Rocky Mountains. 
1422. Equisetnm arvense, Linn. 
Provinces all. Native. 
Lat. 50—61. Cornwall, Wight, Kent. — Orkney, Shetland. 
Zones 123. Tyne to 650 yards. Humber to 550 yards. 
Census 18 38 94. Ireland 12. British type of distribution. 
Europe all. Eastward to China and Japan. 
Russia 6-4321. Himalaya. Siberia. Davuria. Kamtsc. 
North Africa; Milde. — Faroe. Iceland. Greenl. Am. Col. 
1423. Equisetum sylvaticum, Linn. 
Provinces all. Native. 
Lat. 50—61. Devon, Wight, Kent. — Orkney, Sutherland. 
Zones 12845. Highlands to 900 yards on several hills. 
Census 18 36 72. Ireland 10. British type of distribution. 
Europe all, except Finmark. 
Russia 6-4 321. West-asia. Siberia. Davuria. Wamtse. 
— Faroe. Iceland. Greenland. America. Columbia. 
