510 APPENDIX. 37. ADIANTUM. 



serrulate, pellucid-striated; terminal leaflets rhomboidal-lanceolate, lower 

 sometimes subrotundate. Texture coriaceous; upper surface somewhat 

 glossy, lower opaque; veins rather flahellate, terminating in the sinuses 

 between the serratures. Sori 1 — 2 to a leaflet, on the upper edge, 

 transversely oblong or linear-oblong, rather straight; sporangia springing 

 from the veins only; indusium narrow, coriaceous, dark-brown. 

 Amboina. 



(10a*) A. Eflgieworthii, Jffe.; Bedd.. Ferns Br. I., I, tab. XVII. 



Fronds linear-lanceolate, about 2'/2 cm. broad, acuminate, the lower 

 leaflets somewhat abbreviated and deflexed, the higher growing gradually 

 smaller and obliquely triangular. 



40. PLA^GHOOYIilA, Mettenius. 



(4) ■•. glaiica, Melt.; Lomaria glauca, BL, Kze, Farnkr., 11, tab. 

 CXXXVIII. 



(6) ■*. ciipblebia, Mett.; Lomaria eujMebia, Kze, Farnkr., II, 

 tab. CXXV. 



43. HISTIOJPTEIMS, Smith. 



(*1) H. alte-alpina, *% a. ». R., in Buh. Btz., 1916, XXIII, 13. 



Rhizome creeping, paleaceous, the scales brown, fibril-like. Stipes 

 to 6 cm. long, naked, subcastaneous when dry. Fronds deltoid, 5 — 10 

 cm. long by about as broad, 2-pinnatifid, sub-2-pinnate. Lowest pinnae 

 largest, to 2'/j cm. broad, deeply pinnatifld, at best pinnate at the base, 

 with the segments (lobes or pinnulae) triangular, blunt or bluntish, 

 revolute at the edge, the lowest (stipule-like) ones more or less abbreviated, 

 narrowly subcordate at the base. Texture rigid; veins once or twice 

 forked, somewhat prominent above. 



Sumatra. 



