223 
XXIV. Ferns. Crypt. Filices. 
Bogs, July, P. Rare. 
Potton Marshes, — Ampthill Bogs. 
Ohs : 
Spike very slender. Sheaths of the joints pale, not infre* 
quently growing in my specimens at 3 inches distance from 
each other. 
Adder" s-tongiic. Oph ioglossum. Gen. PL 
1621. 
Capsules numerous, growing together bn a 
membrane into a double rowed spike, nearly 
round; when ripe opening transversely. 
Ring none. Seeds many, very small. 
726. Common Adder" s-tongue. O. vulgatum. 
Frond ovate. — Sowerby. 108. 
Meadows, May, P. Common. 
Ohs : 
Root fibrous, leaf indistinctly heart-shaped, and bearing a 
2 -rowed spike on a longfruitstalk, 
Moonzvort, Osmunda. Gen. PI. 1622. 
Capsules distinct, disposed in a bunch, crow- 
ded, sitting, nearly round, opening trans- 
versely. Ring none. Seeds many, very small. 
727. Common Moonzvort, — O. Lunaria. 
■ Bunch lateral, leaf winged, solitary. Sow- 
erby. 31 8. 
Pastures, May, P. Rare. 
Oakley 
