WOODSIA. LASTREA. 523 



6. ? P. flex' He (Moore) ; fronds linear-lanceolate, bipinnate, 

 pinna ovate-lanceolate distant, pinnules narroiv at their base ob- 

 ovate bluntish serrate and with unbranched veinlets, clusters 

 chiefly on lower half. N. ed 3. 203. P. rheticum Fl. Dan. 

 2607 ? Athyrium (Sy.). Stipe short. Fronds much less 

 divided, narrow, elbowed, spreading- horizontally. Abundant 

 in Glen Prosen, Forfarshire. Glen Lyon, Ben Aulder. P. 

 VII. VIII. S. 



3. WOODS'IA R. Br. 



1. W. ilven sis (R. Br.) ; frond lanceolate hairy and chaffy 

 beneath pilose above^jwmtc oblong or ovate pinnatitid, lobes very 

 blunt nearly entire.^. B. S. 2616. II. F. 8. N. 137. Rhi- 

 zome tufted. Stipe jointed. Frond 1 5 inches long ; pinnae 

 4 6 lines long, mostly opposite.; Exposed alpine rocks. Glyder 

 Fawr, N. Wales. Falcon Glints, Durham. White Coombe, 

 Dumfries. P. VII. E. S. 



2. W. hyperborea (R. Br.) ; frond linear-lanceolate or oblong 

 pinnate glabrous or slightly hairy only beneath, pinnte triangular 

 pinnatifid or lobed, lobes 37 very blunt nearly entire. E. B. 

 2023. II. F. 7. N. 143. Acrostichum alpinum Bolt. t. 42. 

 Rhizome tufted. Stipe jointed. Frond 1 3 inches long ; 

 pinnae mostly alternate, a little longer than broad ; pinnules 

 2 3 lines long. Exposed alpine rocks. Breadalbane Mts., 

 Perthshire. Clogwyn y Garnedd, Snowdon. P. VII. E. S. 



Tribe II. Aspidiea. 



4. LAS'TREA Presl. l 



* Lateral veins simple or forked. Clusters on the simple veins or 

 either or both branches. 



1. L. Thelyp' teris (Presl) ; rhizome slender far-creeping, 

 fronds pinnate, pinnae linear-lanceolate pinnatifid slightly downy 

 but without glands, lobes oblong, clusters submarginal. H. F. 

 13. N. 183. Fronds lanceolate ; earlier barren with flat lobes ; 



1 Adanson's genus Dryopteris, established in 1763, apparently included 

 Polystichum and Lastrea, and there seems no valid reason for its rejection. 

 Some recent authors have adopted it in place of Lastrea, retainingPo?^- 

 stichum, but this position does not appear to us to be tenable. We have 

 preferred leaving the genera as in the last edition, until the matter lias 

 been satisfactorily dealt with. H. & J. G. 



