Part 1, 1909] CVYATHEACEAE 17 
darker toward the base, there tuberculate (otherwise unarmed) and clothed with large ovate 
attenuate dark-centered castaneous scales; lamina slender, 1-2 meters long, 60-90 cm. 
broad, tripinnate, chartaceo-coriaceous, dark-green, glabrous throughout -except for the 
costae and costules, these densely ferruginous-pubescent above with somewhat appressed 
hairs, the costules also with a few deciduous lustrous brown builate scales below ; rachises 
light-brownish or light-castaneous, smoothish ; pinnae lax, long-petiolate (3.5-5 em.), 30-45 
cm. long, 15-28 cm. broad, elongate-triangular, the apex serrate-acuminate; pinnules 10-14 
pairs, petiolate, the lowermost the largest (up to 14 cm. long and 5 cm. broad) and long- 
petiolate (more than 1 cm.), those above narrower, finally deltoid-lanceolate ; segments of 
the larger pinnules about 13 pairs, linear-oblong to lanceolate, nearly straight, the lower- 
most the largest (3 cm. long, 6 mm. broad), subsessile, distant, and often deeply inciso- 
serrate (the apices subacute), those above gradually smaller, closer, adnate, finally connected 
by a broad foliar wing below the long serrate-acuminate apex; veins 10-12 pairs, mostly 
soriferous, 1 to 3 times forked or (in the largest segments) pinnately forked ; sori numerous, 
large, single at the lowermost fork of the vein or in clusters of 2 or 3 upon the pinnately 
forked veins; indusium globose, firm, glaucous, bursting into several persistent saccate 
lobes ; receptacle large, capitate, setiferous. 
TYPE LOCALITY: Fox’s Gap, Jamaica. 
DISTRIBUTION : Forested slopes of the Blue Mountains of Jamaica, altitude 1500 to 1800 meters ; 
gregarious in moist sheltered situations. 
21. Cyathea divergens Kunze, Linnaea9: 100. 1834. 
? Cyathea equesiris Kunze, Linnaea 9: 100. 1834. 
Alosphila subaspera Christ, in Pittier, Prim. Fl. Costar. 3: 43. 1901. 
Cyathea pelliculosa Christ, Bull. Herb. Boiss. II. 4: 946. 1904. 
Caudex erect, 2.5-6 meters or more high, relatively slender, brown, not armed, the 
fronds divergent and somewhat drooping, articulate, leaving smoothish elliptic or narrowly 
oval scars 6-7 cm. long and 2.5-3 cm. broad, the spaces among these near the summit 
closely clothed with rigid subulate dark-brown scales (1-2 cm. long) with narrow whitish 
margins; stipe 60 cm. or more long, 2-3 cm. in diameter, paleaceous upon the upper side 
like the caudex, below densely armed with short sharp conical spines 2-3 mm. long, light- 
brown, closely and deciduously light brownish-furfuraceous, eventually more or less lus- 
trous, the primary rachis yellowish-brown, similarly aculeate at least below, usually muricate 
above; lamina very ample, deeply tripinnatifid, the leaf-tissue rigidly coriaceous; pinnae 
petiolate (the lower ones up to 4.5 cm.), deltoid-lanceolate, the larger ones 60-75 cm. long, 
20-28 cm. broad, acuminate, the secondary rachis dull- or brownish-stramineous, aculeate, 
sharply muricate, or smoothish below, above strigose ; pinnules 16-21 pairs, distant, spread- 
ing, the lower and middle ones of the larger pinnae long-petiolate (3-9 mm.), 10-15 cm. 
long, 2.5-4 cm. broad at or near the base, deltoid-lanceolate, at least deeply tripinnatifid, 
the apex attenuate-acuminate, the costae densely strigose above, glabrous below; seg- 
ments 16-20 pairs, subfalcate, oblong to linear-oblong, the lower pair or two the largest, 
semiadnate to sessile, apart, 4-5 mm. broad, those above fully adnate, closer and connected 
by a gradually widening wing 1.5-2.5 mm. broad upon either side of the costa, or all 
the segments adnate and connected, separated by narrow acute sinuses, these appearing 
wider from the revolute subentire to crenulate-serrate margins, the apices obliquely sub- 
truncate, usually subacute in drying; costules yellowish and glabrous above, below dark, 
glabrous, or with an occasional reduced slender brownish deciduous scale; veins about 10- 
13 pairs, mostly setiferous, dark, close, oblique, mostly 1- or 2-forked, glabrous ; sori large, 
seated at the forking of the veins, inframedial (or the lower pair or two distant from the 
costule), strongly confluent at maturity ; indusia globose, yellowish-brown, lustrous, mem- 
branous, bursting irregularly, the divisions delicate but mostly persistent; receptacles 
large, capitate, conspicuously long-hirsute with beaded hairs. 
s LOCALITY : Pampayaco, Pert. . 
Gbidiaoen Costa Riva, up to 2700 meters altitude; Peru ; reported also from Ecuador and 
bia. ; 
eee aioaet Hook. Sp. Fil. 1: p/. 114 ;? Kunze, Farrnkr. £1. 76 (as C. equesiris). 
