Part 1, 1909] | CYATHEACEAER 
Pinnules elongate-deltoid to lanceolate-deltoid, the costae not pal- 
eaceous below. 
Primary and secondary rachises smooth or nearly so; pinnules 
10-14 pairs, the larger ones elongate-deltoid ; indusia subcori- 
aceous, opaque. — ; 
Primary rachis spiny nearly throughout; secondary rachises 
mostly muricate ; pinnules 17-21 pairs, deltoid-lanceolate ; in- 
dusia membranous, lustrous. 
Pinnules sessile or short-petiolate (3 mm., rarely). 
Pinnules cut to the costa nearly throughout, only the apical seg- 
ments united by a very narrow wing. 
Secondary rachises densely furfuraceo-paleaceous, the squamose 
covering persistent. 
Secondary rachises deciduously paleaceous or lightly furfurace- 
ous, eventually glabrous. 
Primary and secondary rachises muricate or scabrous from 
the tuberculate bases of the slender deciduous scales. 
Pinnae 25-35 cm. broad; pinnules 13-18 cm. long, 1.7-3 
cm. broad; segments 25-32 pairs; rachises coarsely 
muricate. 
Pimnae 15-20 cm. broad; pinnules 10 cm. long or less, 
1.3-1.8 cm. broad; segments 17-20 pairs; rachises finely 
scabrous. 
Primary and secondary rachises smooth. 
Sori 2-4 pairs, basal upon the veins and segments ; indusia 
brownish, membranous. 
Sori usually 8-10 pairs, medial, covering the segments ; 
indusia whitish, coriaceous. 
Pinnules not cut to the costa or if so only at the base, the costae 
thus alate nearly throughout (at least narrowly so). 
Segments variously hairy upon the upper surface. 
Hairs of the upper surface of the segment confined to the 
costule. 
Costules with numerous spreading persistent hairs above ; 
indusia hyaline, delicately membranous, the divisions 
mostly fugacious. 
67 
20. C. gracilis. 
21 
24, 
25. 
27. 
Costules with a few appressed deciduous hairs above; in- - 
dusia brown, firmly membranous, the divisions persis- 
tent. 
Hairs of the upper surface of the segment not confined to the 
costule. 
Costules conspicuously hairy above. 
Hairs above very long, confined to the costule and veins ; 
costules clothed below with numerous whitish bullate 
scales, with long stiff whitish hairs intermixed. 
Hairs shorter, lax, borne upon the costule, veins and 
leaf-tissue both above and below ; costules bearing a 
few small deciduous fibrillose or laciniate rusty scales 
below. 
Costules inconspicuously hairy above, or with age nearly 
glabrous. 
Pinnules deltoid-lanceolate, manifestly broadest at the 
base. 
Pinnules oblong-lanceolate. 
Segments subentire or obscurely crenate, conform ; 
costules bearing a few minute whitish scales below. 
Segments sharply crenate-serrate, the proximal basal 
one usually semihastulate ; costules clothed below 
with numerous whitish or light-yellowish scales. 
Segments apparently glabrous above, or with a few (2-4) rigid 
hairs near the apex. 
Costules bearing bullate scales below, these often obscured 
by the confluent sori at maturity. 
Segments manifestly ciliate. 
Pinnules deltoid-lanceolate, broadest at the base, distant. 
Pinnules oblong-lanceolate, mostly imbricate, larger. 
Segments not ciliate (or in No. 34 the hairs beneath ex- 
tending nearly to the margin). 
Veins 10-12 pairs to the segment. 
Scales of the costules whitish or light-yellowish, 
numerous; segments sharply bicrenate-serrate ; 
veins obscurely setulose below. 
Scales of the costules ferruginous, fewer; segments 
lightly crenate-serrate; veins copiously pilose 
below. 
Veins 7 or 8 pairs to the segment. 
Sori large, the indusium firmly membranous, per- 
sistent; costae below bearing large castaneous 
scales, long-pilose (at least in the outer part). 
32. 
33. 
31. 
32. 
33. 
34. 
. C. divergens. 
. C. Imrayana, 
. C. princeps. 
C. insignis, 
C. caribaea. 
. C. Brunet, 
C. lenera. 
. C, dissoluta. 
. C. furfuracea. 
. C. Harrisii. 
. C. Maxont. 
C. onusia. 
C, suprastrigosa. 
C. Maxont. 
C. onusta. 
C. suprastrigosa, 
C. aphlebioides. 
. C. dissoluta, 
