Part 1, 1909] CVYATHEACEAE 73 
cm.) ; pinnules 25-35 pairs, approximate, sessile, patent, 8-10 cm. long, 1.2-2 cm. broad, 
lanceolate-oblong, cut nearly or quite to the costa, the apex serrate-acuminate, the costa 
brownish, densely long-setose above, below sparingly furfuraceo-paleaceous and pilose in 
the outer part with stiff yellowish hairs; segments 18-20 pairs, subfalcate, oblong, slightly 
oblique, acute, the basal ones slightly apart and subsessile, the others approximate and 
adnate, the margins subrevolute, crenate-serrate, doubly so below; veins (7-10 pairs) 
once- or twice-forked, naked; costulae naked above, below bearing a few yellowish-brown 
bullate scales and stiff yellowish hairs ; sori near the costule at the forking of the veins, 4-6 
pairs, occupying two thirds or less of the segment; indusium very deeply cyathiform, or 
before maturity ovoid and greatly constricted at the mouth, membranous, pale-castaneous ; 
receptacle conical, dark-grayish, minutely furfuraceous. 
TYPE LOCALITY: Mayday Mountains, Jamaica. 
DISTRIBUTION: Apparently confined to Jamaica, there common in forests at from 300 to 1200 
meters elevation. 
ILLUSTRATION: Hook. Gen. Fil. p/. 23. 
12. Cyathea Tussacii Desv. Mém. Soc. Linn. Paris 6: 323. 1827. 
Caudex 6-7 meters high, 10-15 cm. in diameter, rough, toward the crown very densely 
covered with sharp curved spines, the fronds deciduous (frequently all falling together sea~ 
sonally), leaving large rough oval scars; stipe very stout, 3 cm. or more thick at the base, 
35-75 cm. long, curved, everywhere grayish-furfuraceous and densely armed with strong 
curved purplish-brown spines 6-9 mm. long, the inner side with numerous very narrow 
dark-brown scales; lamina ample, 2.5 meters or less long, about 1.25 meters broad, slightly 
reduced at the base, tripinnate, coriaceous, dull-green above, grayish-green beneath; pri- 
mary rachis yellowish-brown, tuberculate near the base, above muricate, finely furfuraceous, 
conspicuously fibrillose with slender striped tawny or grayish scales; pinnae numerous, 
alternate or subopposite, approximate or their bases imbricate, sessile or short-stalked (only 
the lowermost long-stalked, up to 15 cm.), lanceolate, 60-70 cm. long, 18-24 cm. broad, 
slightly oblique, short-acuminate, the secondary rachis yellowish, furfuraceous, similarly 
fibrillose (especially at the base); pinnules about 35 pairs, approximate or slightly spaced, 
8-11 cm. long, 1.7-2.3 cm. broad, at the base fully pinnate, nearly so throughout, tapering 
rather abruptly in the outer fourth to a serrate-acuminate apex, the costa pilose and densely 
paleaceous, the scales pale-olivaceous, lanceolate to ovate; segments about 22-24 pairs, nar- 
rowly oblong, 9-11 mm. long, 3.5-4 mm). broad, close, slightly falcate, subacute, the mar- 
gins entire, subrevolute, the costule clothed like the costa; veins 11-13 pairs, mostly once- 
forked near the base; sori 1-3 pairs, at the forking of the veins, close to the costule and 
obscuring it, basal on the segment; indusium deeply cyathiform, pale-brownish, membran- 
ous; receptacle stout, setiferous, extruded with age. 
TYPE LOCALITY : Jamaica. : : 
DISTRIBUTION: Known only from Jamaica, there common in damp forest ravines of the Blue 
mountains, at from 900 to above 1800 meters elevation. 
13. Cyathea cubensis Underwood, sp. nov. 
Caudex 3-4 meters high, 8-12 cm. in diameter, appearing thicker from the clinging 
bases of old fronds, somewhat spiny; definite stipe-scars rare, these rough with protruding 
fibro-vascular bundles or rarely smooth, elongate-oval, about 7 cm. long, 3.5 cm. broad; 
stipe 25-35 cm. long, 2-3 cm. thick, pale- or yellowish-brown, densely rusty-furfuraceous, 
paleaceous at the base (the scales somewhat flaccid, pale-brown) and armed with numerous 
scattered nearly straight dark-brown spines below and at the sides, the upper surface un- 
armed ; lamina about 2.5 meters long, 1-1.25 meters broad, tripinnate, chartaceo-coriaceous, 
dark-green above, paler below, the primary rachis yellowish-brown, minutely furfuraceous, 
glabrescent, slightly spinescent toward the base, smooth above; pinnae approximate, all 
but the lowermost sessile, 45-65 cm. long, 17-24 cm. broad, lanceolate, the apex long-acu- 
minate, deeply serrate, the secondary rachis yellowish or pale-brown, slightly furfuraceous 
below, above sulcate, appressed-hirsute, and slightly fibrillose ; pinnules 25-30 pairs, ap- 
proximate or a little apart, sessile or nearly so, 9-12 cm. long, 1.75-2.2 cm. broad, tapering 
