274 



LASTREA FILIX-MAS. 



of a single lobe; usually tlie branching pinnse bave three pairs 

 of opposite pinnules below the branching, the other pinnae 

 have only the basal pair opposite, the remainder being 

 alternate. The basal pinnules are deeply cut and irregular in 

 shape, the others being merely strongly bidentate. The apex 

 of the frond is also branched. My thanks are due to Mr. 

 Scott for fronds. 



Fig. 224. — A, Pinnai of young frond. B. Apex of mature frond. 

 C. Middle pinna of mature frond. 



Multiformis, JVollastofi. (Fig. 224.) — A variety of Lastrea 

 propinqua, Wollaston. A slightly interrupted form, having the 

 tips both of the frond and more or less of the pinnse, 

 irregularly multifurcate or crested, and the lobes laciniately 

 divided. Otherwise it is of the ordinary type of the species. 

 Found by ]\Ir. T. M. Barnes, of Levens, Lancashire, in Long 

 Sleddale, to whom I am indebted for fronds. 



