80 WHERE TO FIND KERN*. 



York. In Wales, in the counties of Anglesea, Caer- 

 marthen, Caernarvon, Denbigh, Flint, Glamorgan, 

 Merioneth, Montgomery, Pembroke, and Radnor. In the 

 Isle of Man. In Scotland, in the counties of Aberdeen, 

 Argyle, Ayr, Banff, Berwick, Caithness, Clackmannan, 

 Dumbarton, Dumfries, Edinburgh, Elgin, Fife, Forfar, 

 Haddington, Inverness, Kincardine, Kinross, Kirkcud- 

 bright, Lanark, Linlithgow, Nairn, Orkney (including 

 Shetland), Perth, Renfrew, Ross, Roxburgh, Selkirk, 

 Stirling, and Wigton : also in the islands of Bute and 

 Skye. In Ireland, in the counties of Antrim, Cork, 

 Down, Galway, Londonderry, and Wicklow. It is found 

 at various heights up to two thousand seven hundred 

 feet above the sea-level. 



XV. THE ADDERS-TONGUE. 



Ophioglossnm rulgatmn. 

 (Plate XL, Fig. 3, page 69.) 



LENGTH OF FROND. Three to twelve inches, the 

 maximum length given being exceptional. 



GENERAL DESCRIPTION. Roots Tew in number, brittle, 

 thick, fleshy. Rootstock erect, elongated, fleshy, small in 

 size. Fronds of two parts, barren and fertile, having a 

 common stipes the barren part a single, oval-shaped, 

 entire pinna (equal in size to the circumference of a hen's 

 egg), the base of which forms the top of the sheath that 

 constitutes the upper part of the stipes and clasps the 

 lower part of the stem of the fertile portion of the frond. 

 Fructification produced in small globular spore-cases 

 arranged in two lines, on opposite sides of the upper 

 part of the fruitful branch of the frond, which thus 

 becomes a terminal spike of fructification. 



