1940 OLVI. FILICES. [Todea. 



generally under 12. Stipes 10 to ISln. long, terete or nearly so, with few scales, 

 slightly stained with chestnut. Fronds 2 to 3ft. long, lanceolate in outline, 

 bipinnate ; pinnas nearly opposite, about 30 on each side of rhachis, the centre 

 ones about 6in. long and l^in. wide ; secondary rhachis narrowly winged ; 

 pinnules fin. long, 2J lines broad, serrately lobed ; veins simple or forked, 1 to 

 each tooth or lobe ; spore-cases minute, in masses of from 2 to 5 at the base of 

 the pinnule. — Bail. Litho. Ferns. Ql. 20. 



Hab.: In a deep rooky gully or creek on the summit of the south peak, Bellenden-Ker. 



The thin dark-green pellucid fronds of this fern remind one of the New Zealand species T. 

 (Leptopteris) hymenophylloides. 



The species is also in New Guinea and the South Pacific Islands. 



12. TRICHOMANES, Linn. 



(Name of uncertain application.) 



Rhizome creeping, slender as in Hymenophyllum or short and rather thick. 

 Fronds usually small, of a delicate membranous half pellucid texture, entire or 

 variously divided and nerved. Sori terminal or lateral. Indusium of the 

 texture of the frond and continuous with it, tubular or turbinate at the base and 

 immersed in the margin of the frond or protruding from it, with a narrow usually 

 spreading border entire or nearly so. Receptable linear, usually exserted. Spore- 

 cases sessile at or near its base. 



A large genus, with tlie wide geographical range of Rymenophyllum, to which it is closely 

 allied, differing only in the shape of the indusium. 



Fronds round-cordate, nearly or quite sessile, usually less -than 3 lines 



long. Sori solitary, exserted from a deep terminal sinus IT. Motleyi. 



Fronds linear almost ouneate, rarely lobed, seldom exceeding 4 lines. 



Sori solitary, terminal on frond or lobes, sessile 2. T. vitiense. 



Fronds ovate, frequently lobed, 4 to 6 lines, sometimes lobed at the top. 



Sori terminal, sessile . . 3. 2'. yandiiifiise. 



Fronds sessile, orbicular, peltate, J to lin. diameter. Sori few . . 4. T. peltatum. 



Fronds undulate, irregularly lobed in the upper half or entire, tapering 



to the short stipes, 3 to 9 lines long. Sori terminal ... . . 5 T. muscoides. 



Fronds nearly orbicular, 3 to 4 lines diameter, palmatifid. Sori terminal 6. T. pnrvuhim. 

 Fronds deeply divided into 3 to 6 linear denticulate lobed segments. 



Sori terminal . . . . ... 7. I', digitatum. 



Fronds stipitate, 6 lines broad, more or less lobed. Sori 1 to G . . . 8. T. cuspidalum. 



Fronds 6 lines long, pinnately-lobed ; stipes scaly-hairy at the base, the 



lobes very narrow. Sori terminal 9 i'. Kuriii. 



Fronds on long very slender stipites, deeply divided into irregular often 



distant segments . 10. T. minutum. 



Fronds elongated, very slender, the segments distant-flabelliform. Sori 



terminal ... . 11. T. proliferum. 



Fronds with stipites about lin. high, pinnse 3 or 4 lobed. Sori on the 



upper side of the pinnse distant from the axil • . 12. 2'. Wildii. 



Fronds ovate in outline, 1 to 2in. high ; pinnules pinnatifid ; rhiichis 



winged in the upner part. Sori several to each pinnule . . . . l.S. T. pyxidifentm. 



Fronds ovate in outline, 1 to 3in. high; pinnules pinnatifid, segments 



sometimes acute. Sori often solitary near base of primary segments . 14. T. filicitla. 

 Fronds like T. p!/a;/(Ji/«n««, but stipites flat with oiliate ma' gins. Sori 



towards the apex of frond 15. 7'. Barnardianum. 



Fronds 2 to 4in. high, very delicate, pinnas rather distant and short. 



Sori usually 1 near the base of each pinna .... 16. 2'. venosum. 



Fronds ovate-lanceolate, 2 to 4in. long, 1 to 2in. broad, bipinnatifid, 



glaucous on the back. Sori axillary 17. T. ;gallidum. 



Fronds pinnate, 3 to Sin. long, the pinnules narrow, bipinnatiifid , often 



tapering to a point. Sori on the lower inner lobes of the segments . 18. T. caudatam. 

 Fronds bipinnate, 4 to Sin. long, pinnules bipinnatifid, the ultimate lobes 



linear. Indusia above J line long and broad, with a broad 2 lobed 



border .... ' . . 19. 2'. apiifolium^ 



Ultimate lobes setaceous. Indusia under J line long, with a small 



entire border . ... 20. T. parvijlorum. 



Fronds pinnate, 2 to 4in. long, the lobes numerous, rather thick and 



broad, oiliate-toothed. Sori not numerous 21. T.javajtitum. 



