ITGODB^. — CEEATOPTEErcnrEJE. CXVU. 



having a many-rayed apical ring, attached at or near the apices of 

 the venules in an irregular intramarginal series. Veins (of the pin- 

 nules) pinnate, from a central costa ; vemUs simple or forked, free. 



Pronds bi-pinnate or sub-tri-pinnatifid, herbaceous. Ehizome 

 short, creeping. — This genus and Trochopteris, differ from the 

 other genera of the group, in the production of their spore-cases 

 near the margin of the &a,t scarcely contracted segments. 



Ex. : M. thuiifraga, Sw. 



164. TROCHOPTEBIS, Gardner, Book. Lond. Jown. 



Bot. i. 74, t. 4. 



AlTEITffTff! Sp,, Auct, 



Fructifications borne on the laoiniated margins of the some- 

 what contracted flat leafy lobes (basal pair) . Spore-cases bluntly 

 ovate, having a many-rayed apical ring, which extends from the 

 apex half-way down ; sessile Di-serial on the upper or inner face 

 of the narrow marginal segments. Veins flabellato-dichotomous ; 

 venules free. 



Fronds rosulate, scarcely an inch long, spreading horizontally, 

 sub-rotund, pilose, five-lobed, the two basal lobes somewhat con- 

 contracted, flat, laciniate, sporangiferous. Ehizome short, erect. 

 — A singular little plant, inhabit more like a rosulate lichen than 

 a fern ; sufficiently distinguished from Anemia by the fructifica- 

 tions being produced on flat lobes — so little changed and lying 

 flat in the plane of the frond, that they look like mere diminished 

 basal lobes. 

 Ex, : T. elegans, Q-ardn. 



Ore?.— POIYPODIACE^. 2V.— CERATOPTEEIDINE^. 



165. CEBATOPTERIS, SrongniaH, Sull. Soc. FUl. 

 1821, 184; Id., Diet. Class. d^Hist. Nat. iii. 351. 



Tbleozoma, JS. Srovm; Cetttogeihs, Michard MS; Chxadostachts, 

 WalUch MS; Ellosocabfus, Kaulfusa; Paekeeia, Sooier; Beltisia, 

 ^fw-SeZ, inpart; Fusoaeia, J^esvau^; Ftebidis sp.,Auct.; Aoeostichi 

 sp., Auet. 



Sort indusiate, continuous, occupying the longitudinal veins. 



[May, 1857.] j, 



