POLYPODIE.E — NirnOBOLUS. 113 



3. Lower surface appressed — woolly. 



4. Veins hidden (3) N. achrostichoides 



4. Veins evident (4) N. Lingua 



3. Lower surface very sparsely pubescent. 



4. Veins evident (5) N. sphaerostichum 



4. Veins hidden (6) N. varius 



2. Fronds decidedly dimorphous. 



3. Sterile frond nearly glabrous, spatulate.... (7) N. adnascens 



3. Sterile frond orbicular, very woolly (8) N. nummiilariaefoHus 



1. Areolte irregular, with included veinlets in various 

 directions. 



2. Stipe 2 to 10 cm. high. 



3. Paleffi of rhizome linear, entire (9) N. samai-ensis 



3. Palese of rhizome ovate, serrulate (10) N. angustatus 



2. Frond sessile (11) N. splenflens 



(1) N. fissus Blume. Rliizome stout, short-creeping, clothed with squar- 

 roso, lanceohite-acuminate ferruginous scales; fronds sessile or nearly so, 

 15 to 30 cm. high, 15 to 35 mm. broad, narrowed very gradually to both 

 ends, entire, subcoriaceoiis, upper surface naked, lower densely coated with 

 soft woolly, ferruginous tomentum; veins invisible; sori close, scattered, 

 immersed among the tomentum. 



Benguet, Loher. 

 India, Java. 



(2) N. flocciger Blume. Rhizome wide-creeping clothed with squarrose 

 lanceolate-acuiniiiate scales which are ferruginous when young, turning 

 white; stipes 30 to 45 mm. high, floccose-woolly ; fronds 20 to 30 cm. high, 

 to 10 mm. broad, acute, attenuate to base, entire, rigidly coriaceous, upper 

 surface naked, lower densely matted with whitish or subferruginous to- 

 mentum; veins invisible; sori immersed among the tomentum, covering the 

 upper part of the frond. 



Luzon, Cuming 93; Sorsogon, Baranda ; Mount Arayat, Merrill 3820; 

 Mount Mariveles, Whitford 312. 

 India, Java. 



(3) N. achrostichoides (Forst.) J. Sm. Rhizome woody, wide-creeping 

 clothed with roundish or elliptical scales, black except at the margin; stipes 

 about 5 cm. high, stout, erect, glabrous or nearly so, conical at base and 

 inserted into the branch of the rhizome specialized to bear it ; frond 30 to 40 

 cm. high, 10 to 15 mm. broad, attenuate to both ends, entire, rigidly coria- 

 ceous, upper surface naked, lower with a closely appressed whitish tomen- 

 tum; veins invisible; .sori distinct but contiguous, usually covering rather 

 more than tlie upper half of the frond. 



Luzon, Cuniiiif/ (HR ■=('!/clophorus hlumcanus Presl ?) 127; Los Banos, 

 Loher; Xegros, Vopeland ; Davao, Copelaiul. 

 Ceylon to tlic New Hebrides and Queensland. 



(4) N. Lingua (Thunb.) J. Sm. (The Philippine form, described here 

 is Pohjpodium heteractis Mett. and Kuhn.) Rhizome wide-creeping, clothed 

 with spreading, lanceolate, ferruginous .scales; stipes about 10 cm. high, 

 firm, erect; frond not much higher, oblong-lanceolate or oval, apex often 

 cuspidate, base rounded, entire, coriaceous, upper surface naked, lower 



24036 8 



