THE FLORA HONGKONGENSIS. 143 
servation goes, the root-fibres of the first are never, those of the 
latter invariably tuberiferous. 
*Nephrolepis biserrata, Schott; Kuhn, Fil. Afr. 155. (=N. acuta, 
Presl; Hook. and Bak. Syn. Fil. 301.—Aspidium biserratum, Sw. ; 
Benth. Fl. Hongk. 454.) 
73. Davallia divaricata, Blume; Hook. and Bak. Syn. Fil. 96. (=D. 
polyantha, Hook. Sp. Fil. 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. elegans, Sw., but readily distin- 
guished by the intramarginal fructification. 
/4. Microlepia marginalis, mihi. (=Polypodium marginale, Thunb. 
Fl. Jap. 337.—Davallia villosa, Wall., and D. calvescens, Wall. ; 
Hook. Sp. Fil. 1. 172, t. 48.) 
Not 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- 
vallia polypodioides, Don; Benth. Fl. Hongk. 461.) 
This genus differs essentially from Davallia by its exarticulate 
stipes. 
*Cibotium Barometz, J. Sm.; Moore, Ind. Fil. 259. (=C. glaucum, 
Benth. Fl. Hongk. 460, not of Hooker and Arnott.) 
* Gleichenia longissima, Blume; Mett. in Mig. Ann. Mus. Bot. Lugd.- 
Bat. i. 48. (=G. excelsa, J. Sm.; Benth. Fl. Hongk. 442.) 
75. Selaginella. 
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 Rio Uaupés and Rio 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 exceptionally difficult and 
intrieate genus the subject of profound critical study, who are 
competent to name these plants. Though united with Lycopo- 
dium in the ‘Flora Hongkongensis,’ Selaginella differs so essen- 
tially, by the possession of dimorphous sporangia, one kind con- 
taining macrospores, the other microspores, that A. Braun and 
