THE fLOBA nONGKONGElTSIS. 55 



Bervation goea, the root-fibres of tte first are never, those of the 

 latter invariably tuberiferous. 



*Nephrolepis biserrata, Schott ; Kuhn, Fil. Afr. 155. (=N. acuta, 

 Presl; Hook, and Bak. Syn, Ml. 301. — ^Aspidium biserratum, Sw. 

 Smth. m. Hongk. 454.) 



73. Davallia divaricata, Blume; Hook, and Bak. Syn. Fil. 96. (=D. 

 polyantha. Hook. Sp. Ml. i. 168, t. 59 a.) 



Not common in Hongkong ; found also in the mountainous 

 regions of India and the Malayan archipelago. A very hand- 

 some fern, exceedingly like D. el^ans, Sw., but readily distin- 

 guished by the intramarginal fructification. 



74. Microlepia marginaUs, mihi. ( = Polypodium marginale, Thunb. 



Fl. Jap. 337. — Davallia villosa. Wall., and D. calvescens, Wall. ; 

 . Hook. Sp. Fil. i. 172, t. 48.) 



Wot uncommon in Hongkong, and found also on the Chinese 

 main-land, in Japan, in the upper mountains of India, and in 

 Ceylon. 



*Microlepia polypodioides, Presl, Tent. Pteridograph. 125. (=Da- 

 vaUia polypodioides, Don; Benth. Fl. Hongk. 461.) 

 This genus differs essentially from Davallia by its exarticulate 

 stipes. 



*Cibotiiiin Barometz, J. Sm.; Moore, Ind. Fil. 259. ( = C. glaucum, 

 Benth. Fl. Hongk. 460, not of Hooker and Arnott.) 



♦Gleichenia longissima, Blume ; Mett. in Miq. Ann. Mus. Bot. Imgd.- 

 Bat. i. 48. (=-G. excdsa, J. Sm.; Benth. Fl. Hongk. 442.) 



75. Selaguiella. 



A fourth species of this genus, with a widely spreading and 

 rooting stem, the leaves of which are all appressed, and giving 

 out shortish branches, with flabellate or palmate divisions, roundish 

 in outline, exists in my herbarium, gathered by the late Dr. 

 Harland and myself. The late Sir "W. Hooker determined it as S. 

 stolonifera. Spring ; but it is certainly different from Mr. Spruce's 

 specimens from the Eio Uaupes and Eio Negro, distributed under 

 that name ; nor can I identify it with any Indian or Ceylon 

 species in my possession. It is, however, only those who, like 

 Prof. Alexander Braun, have made this exceptioiially difficult and 

 intricate genus the subject of profound critical study, who are 

 competent to name these plants. Though united with Lycopo- 

 dittm in the ' Flora Hongkongensis,' Selagi/nelta differs so essen- 

 tially, by the possession of dimorphous sporangia, one kind con- 

 taining macrospores, the other microspores, that A. Braun and 



