6 



2- T. punctatum. 

 bb. Fronds entire, or irregularly lacerated, or lobed ; £ - 1 in. 1. 



3. T. apodum. 



4. T. sphenoides. 



bbb. Fronds £ - 1 or 2 in. L, lobed or regularly pinnately-parted. 



5. T. pusillum. 



6. T. reptans. 



bbbb. Fronds 1 - 2 in. 1., pinnately-parted, or twice-pinnately-parted. 



7. T. Kraussii. 



aa. Fronds entire or almost entire; edged with circular scales attached by the centre. 



8. T. niembranaceum. 



aaa. Fronds entire or lobed, margins lined by a pellucid streak. 



9. T. muscoides. 



aaaa. Sori in a copious lateral unisonal row ; fronds pinnated (rarely enlire or twice-pinnately- 

 parted), often rooting and producing young plants at the end of the fronds. 

 b. Fertile fronds not contracted. 



10. T. pinnatum. 



bb. Fertile fronds contracted, of a different form. 



11. T. spicatum. 



aaaaa. Fronds lobed, pinnately-parted, or pinnate. 

 b. Fronds lobed. 



12. T. sinuosum. 



bb. Fronds lobed or pinnately-parted. 



13. T. pinnatifidum. 



bbb. Fronds pinnately-parted or pinnate. 

 e. Pinnae entire. 



14. T. crispum. 



cc. Pinnae dentate, lobed, or pinnately-parted. 



15. T. lucens. 



16. T. crinitum, 



17. T. Kaulfussii. 



18. T. alatum. 



19. T. Bancroftii. 



aaaaaa. Fronds man}' times pinnately-parted. 

 b. Fronds small or medium size. 



20. T. pyxidiferum. 



21. T. tenerum. 



22. T. trichoideum. 



bb. Fronds a span long or over. 



23. T. scandens. 



24. T. radicans. 



25. T. rigid um. 



1. T. setiferum, Bak. 



Fronds abundant, scattered on the thread-like, difiuse rootstock, 1 - 4 li. 1., £ - 2 li. br., varying 

 in shape from ovate-roundish to narrow, tapering or rounded at base and apex, marked with fine lines 

 membranous, pellucid, on dark thread-like stalks £ - 1 li. 1. veins fine close, forked, spreading, midrib 

 more or less distinct to the apex, margins entire, sometimes uneven, of young fronds, hairy; 



gorus solitary at the end of the midrib ; 



involucres immersed to the neck, lips rounded and dark-edged, closed or open, receptacle enclosed 

 er sometimes protruding. 



Pare on wet rocks in forests at 5,000 - 6,000 ft. alt. Discovered by Messrs. Nock and Jenman 

 near Morse's Gap, growing with Antrophyum subsessile. Both sterile and fertile fronds vary a good 

 deal in form. (It seems to me conspecific with T. exiguum, Bedd. of Southern India and Ceylon, which 

 name has priority. G. S. J.). 



2. T. punctatum, Poir. 



Fronds overlapping or scattered on the thread-like, diffuse, hairy rootstock, round or ovate-oblong, 

 the babe cordate, rounded or tapering, \ - £ in. br. each way, membranous, marked with fine lines, 

 bright rather glossy green, surfaces without hairs, margins of young fronds hairy, even or somewhat 

 uneven, rarely split into partial lobes ; veins, close, fan-shaped, midrib disappearing above base 



involucres immersed or free, with rounded lips. 



Infrequent, on rocks or trees, below 2,000 ft. alt. 



The species is best distinguished from those near it by the more rounded form, shorter stalk, 

 clearer green colour, and somewhat thinner substance, though in nearly all these characters it varies a 

 good deal. Some of the very fertile fronds appear to be lobed from the projections of the involucres. 



3. T. apodum, Hook, and Grev. 



Fronds scattered on the threud-liko, scurfy, diffuse rootstock, \ — | in. br. each way, on stalks 

 I - \ in. 1., rounded, lobed, base cordate, marked with fine lines ; veins close, spreading ; midrib distinct 

 ■upwards; margin uneven with hairs at intervals ; 



involucres with rounded lips, more or less free. 



Pure, gathered by Swartz u century ago, from whose specimens in the British Museum my dee- 



