﻿1. CYATHEA. 19 



tinct, deeply forked. Sori rather small, placed at the forkings of the lower 

 veins; indusium persistent, semiglohose, entire or slightly hroken up as it 

 matures. 



Sulu Islands. 



(11) C isaccata, Christ., Ann. Btz., XIX, 42. 



Dwarftree. Stipes glossy, sulcate helow, convex ahove, yellows-brown, covered 

 with minute warts and prickles, ± 25 c.M. long. Fronds + 115 c.M. long, + 80 

 c.M. broad, ovate, acuminate, narrowed towards the base, 3-pinnatifid. Pinnae 

 distant, stalked, + 12 c.M. broad, ovate, acuminate, caudate, narrowed at the 

 base. Pinnulae distant, 2 — 2 Vj c.M. apart, + 1 Y2 c-M. broad, the lower ones 

 shorter, stalked, lanceolate, the apex serrate, the edge pinnatifid. Segments 13 — 14 

 on each side, ligulate, + 2 Y^ m.M. broad, obtuse, toothed. Texture papyraceous ; 

 upper surface dark-green, under one paler; rachis reddish, those of the pinnae 

 brown or ebeneous; upper surface furfuraceous on the costae, the scales brown ; 

 veins distinct, 9 — 12 on each side, forked. Sori 4—5 on each side, medial; 

 indusium membranaceous, afterwards saccate with the margin entire. 



Celebes. 



* (12) C cydodonta, «?. A. r>. JK.,« Alsophila cyclodonta, Christ, Ann. 

 Btz., XX, 137. 



Main rachis naked, glossy, brownish-green. Pinnae + 60 c.M. long, 

 20 — 25 c.M. broad, acuminate, the base not or harly narrowed, on stalks 

 1 — 6 c.M. long, the rachis hairy above. Pinnulae subsessile, spreading, close, 

 2 — 2'/2 c.M. broad, numerous, the base not narrowed, the apex acuminate, 

 subcaudate, toothed, the costa covered above with adpressed, pale-coloured 

 hairs, clothed beneath with longer, spreading, subulate setae. Tertiary seg- 

 ments linear, falcate, obtuse, ± 2Yj m.M. broad, the higher ones confluent, 

 the others sessile, 2 — 3 m.M. apart, united by a narrow wing, decurrent with 

 a rounded, adnate lobe, the lowest subsessile, with a truncate base, the margin 

 dentate-crenate, the crenations semiorbicular, ± 12 on each side. Texture 

 coriaceous; under surface hairy on the costulae; veins fine, + 12 on each 

 side. Sori + 8 on each side, contiguous, ± medial, not occupying the higher 

 veins, 1 to each crenation ; indusium at length a shallow, deeply and irregularly 

 lobed, membranaceous, persistent, brown cup. 



Borneo. 



(13) C. fusca, JBfe., Becc, Mai., Ill, 31. 



Fronds large, 3-pinnatifid ; main rachis brownish-pubescent. Pinnae oblong- 



