7. GLEICHENIA. § 3. MEBTENSIA. 81 



straight or arcuate-ascending, the higher ascending, the lower rather 

 horizontal, the lowest exterior deflexed, provided with a more or less 

 rudimentary axillary bud, the others alternately so (i. e. each pair of pinnulae 

 is provided with an alternately placed 'axillary bud). Lobes close, horizontal, 

 linear, ± 4 mm. broad, emarginate at the apex, entire, the higher growing 

 gradually shorter, the 1 — 3 lower more or less reduced, not rarely sub- 

 semiorbicular. Texture coriaceous; under surface glaucous, more or less 

 deciduously ferrugineo-flocculent on the costae and costulae ; veins forked, 

 with the anterior veinlets forked again. 

 Sumatra. 



(3&) G. Eluicri, Copel., in Leaf!., Ill, 799. 



Rachis wide-scadent, stout. Pinnae sessile, nearly 1 m. apart, ± I'/j 

 m. long, decurved, the rachis nearly naked, castaneous, glossy. Pinnulae 

 25 cm. more or less long, short-stalked, foliaceous, acuminate, the lowest 

 stipule-like. Lobes remote, linear, straight or curved, entire or rarely 

 crenate, connected by a narrow wing, the lower somewhat reduced. 

 Texture coriaceous; under surface more or less cobwebby with pale, 

 deeply fimbriate scales resembling copiously branched hairs. Sori occupying 

 nearly the whole under surface of the lobes, consisting of 4— 7 sporangia. 



Mindanao. 



(3c) C conversa, r. A. v. JR., in Bull. Btz., 1915, XX, 17. 



Stipes stout. Fronds forked, the axillary buds flanked by pinnatifid 

 stipules and provided with long, linear-subulate, brown or pale-brovm 

 scales with black or black-brovpn ciliated edges. Primary branches to 150 

 cm. or more long, pinnate. Pinnulae more or less horizontal, remote, 

 alternate, shortly petiolulate, to 25 cm. long by + 3 — 4 cm. broad at 

 the base, acuminate, deeply pinnatifid. Lobes more or less horizontal, 

 approximate, up to 3 — 4 mm. broad, entire or nearly so, rounded at the 

 apex. Texture coriaceous ; rachises, costae and costulae soon naked, when 

 young the rachises scaly like the axillary buds but the scales smaller, 

 intermixed with black or black-brown tomentum, the costae and costulae 

 provided sparingly beneath with brown or black-brown, deeply fimbriate 

 squamules. Sori consisting of + 3 — 4 capsules. 



Java. 



(4a) G. glauca, JIfc., Spec. Fil., I, tab. Ill B; G. longissima, Bl.; 

 G. japonica, Spr., Copel., in Philipp. Journ , IV°, 26. 

 Fekns and Fern Allies. 6 





