104 
BRITISH FERNS. 
\ 
12. Adiantum. 
1. A. Capillus- Veneris. Fronds branched; leaflets fan - 
shaped. 
DICKS 0NIE2E. 
13. Trichomanes. 
1 . T. radicans . Fronds ovate-pointed, membranaceous. 
14. Hymenophyllum. 
1. H. Tunbridgense. Pinnae vertical; involucre com- 
pressed, serrate. 
2. H. Wilsoni. Pinnae turning to one side ; involucres 
inflated, entire. 
OSMTJKDKJE. 
15. OsMUNDA. 
1. O.regalis . Fronds bipinnate, oval; leaflets oblong, 
entire. 
OPHIOGLOSSE2E. 
16. Ophioglossum. 
1. O.vulgatum . Frond entire, oval ; spike simple. 
a. var. angustifolium. Frond narrow. 
17. Botrychium. 
1. B. Lunaria. Frond oblong, pinnate; leaflets cres- 
cent-shaped, toothed; spike branched. 
a . v. rutaceum. Frond bipinnate ; leaflets narrow. 
LYCOPODIACEjE. 
18. Lycopodium. 
1. L> clavatum. Leaves scattered, incurved, hair- 
pointed ; spikes two or more on a stalk. 
