68 NORTH AMERICAN FLORA [VoLumME 16 
Sori small, the indusium delicately membranous 
and mostly disappearing; costae below spar- 
ingly and minutely paleaceous, obscurely pubes- 
cent, glabrescent. 
Pinnules oblong-lanceolate, 12-15 mm. broad. 35. C. conspersa. 
Pinnules linear-lanceolate, not more than 9 mm. 
36. C. delicatula, 
broad. 
Costules not clothed with bullate scales below. 
Costae glabrous below; sori distinctly apart from the 
costule. 37. C. Jurgensenii. 
Costae squamulose or furfuraceous below, at least toward 
the base, and more or less pilose toward the apex; 
sori borne near to or against the costule. 
Indusia very firm, coriaceous, the main divisions mostly 
persistent; veins and margins bearing stellate 
hairs or minute stellate scales. 
Leaf-tissue rigidly coriaceous ; pinnules lanceolate or 
deltoid-lanceolate, long-attenuate ; veins and mar- 
gins bearing minute stellate scales. 38. C. aureonitens. 
Leaf-tissue rigidly herbaceous ; pinnules oblong, ab- 
ruptly caudate ; veins and margins bearing stellate 
hairs. 39. C. punctifera, 
Indusia membranous, the divisions largely evanescent ; 
veins and margins not bearing stellate hairs or 
scales. 
Pinnae long-petiolate (4 cm. or more); pinnules 
about 20 pairs. 40. C. Trejoi. 
Pinnae subsessile or short-petiolate; pinnules 30-40 
pairs. 
Veins and leaf-tissue glabrous. 41. C. patellaris. 
Veins and leaf-tissue distinctly glandular-setu- 
lose below. 
Secondary rachises deciduously furfuraceous 
below, with slender deciduous whitish 
striped scales intermixed ; costae not pilose 
below. 42. C. basilaris. 
Secondary rachises deciduously furfuraceous 
below, devoid of large scales ; costae with at 
least a few antrorse hairs below toward the 
apex. 43. C. mexicana. 
1. Cyathea Nockii Jenman, Jour. Bot. 17: 257. 1879. 
Caudex 10-20 cm. long, 24 cm. in diameter, procumbent and rooting beneath, rough 
with the bases of old fronds, the crown clothed with numerous shining bright-brown lan- 
ceolate to ovate scales with a dark median stripe; fronds erect, cespitose, broadly oblance- 
olate, bipinnate, 40-110 cm. long, 12-25 cm. broad in the middle, tapering in both direc- 
tions, the apex acuminate, the basal pinnae gradually much reduced and extending nearly 
or quite down to the caudex, the frond exstipitate or nearly so; primary rachis deeply sul- 
cate, covered with grayish linear scales, these mixed with broader striped brownish scales 
below; pinnae numerous, spaced, spreading, the middle ones 6-12.5 cm. long, 1.5-2.3 cm. 
broad, lanceolate from a broad base, coriaceous, dark-green and glossy above, lighter below, 
pinnate, with about 14-20 pairs of segments below the rigid short-acuminate apex, the 
costa with both slender striped grayish scales and whitish bullate ones; segments slightly 
spaced, narrowly oblong, falcate, oblique, acute, mucronate, mostly adnate (only the lower- 
most free and deeply incised at the rounded base), the margins subentire, revolute, the 
costules with a few whitish bullate scales; veins about 7-10 pairs, evident, once-forked 
near the base, or the upper ones simple; sori 1-6 pairs, close to the costule, not reaching 
the apex ; indusia subhemispheric, persistent ; receptacles large, setiferons. 
TYPE LOCALITY: Bellevue, near Cinchona, Jamaica. 
DISTRIBUTION: Confined to the Blue Mountains of Jamaica; not uncommon upon steep for- 
ested slopes near Vinegar Hill, altitude 1000-1200 meters, also below Cinchona. 
2. Cyathea Brooksii Maxon, Contr. U. S. Nat. Herb. 13: 24. 1909. 
Caudex horizontal, mostly subterranean, about 40 cm. long, 3 cm. in diameter, with a 
few coarse cord-like roots below; fronds 2 or 3, long-stipitate, erect-arching, 125 cm. or ' 
more long; stipe 35-40 cm. long, brownish, clothed at the base with a few linear-lanceo- 
late opaque dark-brown scales less than 1 cm. long, above dull yellowish-brown, minutely 
