9. TRICHOMANES. § 2. EUTRICHOMANES. C. GONOCORMUS. 91 



Rhizome wide-creeping, branched, hairy, densely interlaced. Stipes 2'/j — 

 5 c.M. long, slender, naked, flexuose, repeatedly proliferous. Fronds and 

 frondiculae varying from ovate-lanceolate to roundish, to S'/j c.M. each way, 

 digitately divided. Segments narrow, complicate or concavo-convolute, divided 

 down nearly to the base into forked or dicbotomous lobes, the central lobes 

 often elongate and subpinnatifid. Texture membranaceous, subopaque. Sori 

 terminal ; indusium funnel-shaped, marginate (or winged in the lower part), 1^ 

 the mouth dilated, undulate, obscurely 2-lipped. 



Trop. Asia. 



* (18) T. Teysiuanni, r. J». B., Ned. Kruidk. Arch., VS 142, 

 Gonocormus- Teysmanni, V. D. B., Hymen. Jav., 10, tab. V. 



Near T. proliferum, BL, but the rhizome nearly naked, the frondiculae 

 ovate-lanceolate to linear-lanceolate, the segments deeply pinnatifid, the lobes 

 ereeto-patent, 2 — 3-fid, not complicate, the edges slightly undulate. 



Sumatra, Java.- 



% 2. EUTRICHOMANES. d. Ptilophyllum. 



a. Main rachis winged towards the hose only. (19) T. microchilum. 



a.a. Main rachis winged throughout. 



h. Fronds pruinose. Central ribs flanked on each side by a broad stripe 

 consisting of numerous darker coloured cells. (20) T. pallidum. 



b.b. Fronds not pruinose. Central ribs not flanked by darker coloured cells. 

 c. Marginal or submarginal spurious veins present. 



d. Spurious veins quite marginal or apparently so. 



*. Fronds ± l—i% c.M. long, simply pinnatifid. 



(21j T. Nymani. 

 ;(c.*. Fronds + 4%—5 c.M. long, 2—3-pinnatifid. 



(22) T. humile. 

 d.d. Spurious veins not quite marginal. 



e. Accessory spurious veins {between the submarginal one 

 and the midrib) many. (23) T. bilabiatum. 



e.e. Accessory spurious veins few or wanting. 



f. Submarginal spurious vein not or slightly interrupted. 

 Lips of the indusium triangular. 



