CHAEACTEES OF TEIBES AND GBNEEA. 231 



orientalis. With, reg-ard to the two first, herbarium speci- 

 mens lead to the inference that they only represent one 

 species, nevertheless, cultivated plants are readily recog-- 

 nised as being distinct. The Indian species differs in the 

 fertile pinnaa being less involute and more flat than in the 

 preceding. 



Although the species of Strnihiopteris are perfectly dis- 

 tinct in mode of g-rowth and venation from Oii'iclea seiisibiUs, 

 nevertheless they are in "Species Filicum" placed under 

 the latter genus, and .S". pennsylvanica is described as 

 having a special indusium to each sorus, but which I have 

 failed to discover. 



Sp. S. germanica, WilhL (v v.) ; S. pennsylvanica, JFilld. 

 (v V.) ; S. orientalis {Flool: 2ud. Gent. Ferns, t. 4). 



Sect. 7. — Phegopterb^. 

 Fertile piniice plane. Hori punctiform, rarely oblong 

 linear. 



122. — Leptogeamma, /. Sm. (18-11). 

 Gijmiiogramma, sp. Sw. ; Hook. Sp. Fit. 

 Vernation fasciculate, erect, acaulose, or decumbent. 

 Fronds bipinnatifid, 1 to 3 feet high. Vei-ns of lacinas 

 costaeform, pinnate ; venules free, a portion of their length 

 sporangiferous, forming oblong or linear sori. 

 Type. Pohjpodium iottam, Willd. 



Illust. Hook, and Bauer, Gen. Fil., t. 72; Moore Ind. 



Fil., p. 49 A, fig. 5 ; J. Sm. Ferns, Brit, and For., 



fig. 49. 



Obs. — This genus agrees in habit and venation with the 



bipinnatifid species of Fhegopteris, differing only in the 



receptacles being elongated on the venules, thus con- 



