ICONES FILICUM SINICARUM 
PLATE 224 
ADIANTUM INDURATUM Christ 
ADIANTACE: 
ADIANTUM INDURATUM Christ in Journ. Bot. France 1: 233, 265. 1908; C. Chr. Ind. Fil. Suppl. 
I. 4. 1912: Tard. et C. Chr, in Fl. Gen. Ind. 7: 187. 1940; Ching in Acta Phytotax. Sinica 6: 327. 1957. 
In the gross habit, the present species very closely resembles 4. flabellulatum L., but differs chiefly 
and specifically in the fronds being not dichotomously but rather pinnately branched, in the terete stipe, 
rachis and rachilets and in the almost orbicular ultimate pinnules even in the sterile fronds with sterile 
pinnules not sharply but rather bluntly dentate or even crenate-dentate. 
Hainan: Chang-kiang Hsien, Ka-chik Shan, S. K. Lau 2925, December 22, 1933, in the thickets on 
dry gentle hillside of clayey soil, rare; Liang-Chian-ta 66493, under brush wood, December 20, 1933. 
Kwangsi, Pei-seh Hsien, Ecological Survey Party, Bot. Inst. Academia Sinica, without number. 
Tonkin: Eberhardt (type); Chevalier 3062. 
A rather rare fern in the region. Its discovery in Hainan may serve as further evidence that the flora 
of the island is closely related to that of the northeastern part of Indo-China. 
Plate 224. 1. Habit sketch (natural size). 2. Fertile pinna (X 4). 3. Sterile pinna, showing crenate-dentate 
margin (X 4). 4. Scale from the base of stipe (X 40). 5-6. Sporangium with spores (X 100). 
