Class XXIV. Order I. 



A pretty large, smooth I'crn, in habit resembling the last. 

 The divisions of the frond arc principally opposite, or nearly so, 

 and subdivided into segments, much like the last species. Only 

 a few pairs of the divisions, occupying a central part of the 

 frond, become fruitful. These are much shorter than the rest 

 when full grown, they resemble compound, pyramidal racemes, 

 and are covered on all sides with minute, brownish capsules. 

 Low grounds. Perennial. , 



OSMUNDA HEOALIS. L. Osmund royal. Flowering fern. 



Froiid twice pinnate, terminating in a compound 

 cluster of fructification. 



A handsome, branching fern, found in meadows and moisV 

 grounds. Stipe smooth. Divisions pinnate. Leafets or seg- 

 ments perfectly distinct and remote, oblong, very slightly ser- 

 rated, the lower half of base longest. Capsules small, globular, 

 two-valvcd, like the preceding species, arranged in a large, 

 compound raceme at the top of the stipe. Perennial. 



292. LYCOPODIUM. 

 LTOOFODIUM COMPLANATUM. L. Flat club moss. 



Leaves two rowed, united, superficial ones sol- 

 itary ; spikes in pairs, pedunculated. 



A common, trailing evergreen. The stems, which creep 

 on the ground for a considerable distance, are furnished with 

 distinct, somewhat remote scales or leaves. Branches spread- 

 ing, subdivided by regular forks, flattened, two edged. Leaves 

 very short and acute. Peduncles elongated, forked at top, and 

 usually supporting four erect, cylindrical spikes. Bractes- 

 closely imbricated, heart-shaped, acuminate. Woods and pas- 

 tures. Perennial. 



LYCOPODIUM OESCURUM. L. Radiated club moss. 



Leaves scattered, six rowed ; shoots erect ; 



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