42 COPELAND. 



sori small ; costular ; indusium dark, fragile, soon disappearing unless for 

 an irregular base. Fronds whose largest pinnules are less than 3 cm 

 long are sometimes fertile. 



Mindanao (Mount Balabac, alt. 1,200 m). 



39. Cyathea heterochlamydea Copel. in Elmer's Leaflets 2 (1908) 418. 

 Trunk 3 to 5 m high, 5 to 7.5 cm thick; frond sessile, 1.5 m long, 



rachis clear-brown, almost glabrous, rough with small pustules; largest 

 pinnag 30 to 35 cm long, abruptly narrowed below the acuminate apex, 

 raehises chestnut, mottled, asperulous, clothed with minute bullate scales 

 and lanceolate, chestnut ones 2.5 mm long, with dilated bases, both kinds 

 rather deciduous; pinnules subsessile, 7 cm long, 15 mm wide at the base, 

 acuminate, pinnate, costa bearing a few hairs above, and sparse, broadly 

 lanceolate scales 1.5 mm long beneath; segments coriaceous, acute, sub- 

 falcate, serrulate toward the apex, 2 to 3 mm wide, separated by sharp 

 sinuses, the lowest segments free and contracted at the base, and a few 

 succeeding ones free but adnate; lamina dark-green above, pale beneath, 

 glabrous ; veinlets up to 9 on a side, the lower ones forked, black beneath, 

 pale above; sori costular, on the lower half or two-thirds of the segment, 

 indusium consisting of a single large scale fastened beneath the sorus, 

 and inclosing on the costular side half or more of the sorus. Probably 

 related to C. Christii and C. negrosiana. 

 Negros (Horn of Negros, alt. 1,800 m). 



40. Cyathea mitrata Copel. in Philip. Journ. Sci. Bot. 3 (1908) 354. 

 Known only from a pinna and part of the rachis. Eachis brown, 



almost glabrous, minutely scabrous, bearing scar-like aerophores at the 

 bases of the pinnae and along the angles of the rachis; pinna? 40 cm 

 long, 15 cm wide, sessile, their raehises sparsely clothed beneath with a 

 scurf of minute scales, and a very few lanceolate ones 2 mm long; 

 pinnules 7 cm long, 15 mm wide, acuminate, cut almost throughout into 

 distinct secondary pinnules; costse hairy above, bearing two kinds of 

 scales beneath; secondary pinnules linear-oblong, obtuse, the lower ones 

 stalked and deeply lobed, the upper ones crenate, coriaceous, lamina 

 glabrous, black above, brownish-green beneath, margin deflexed; veinlets 

 forked; sori costular, indusium very large and globose, then split like a 

 mitre, or to the base, and very persistent, covering the nether surface. 

 Mindanao (Mount Malindang, alt. 2,800 m). 



41. Cyathea loheri Christ in Bull. Herb. Boiss. II 6 (1906) 1007. 



Trunk 5 m high; frond 1 m long, 40 cm broad, with pinnse down to 

 the base of the stipe; middle pinnae 30 cm long, the lowest reduced to 

 hardly 6 cm; stipe chestnut, rough with minute pustules; raehises and 

 costas rufous-hairy above, densely scaly beneath, with large, whitish, fim- 

 briate scales and minute, bullate, rufous ones; pinnules 7 cm long, 13 mm 



