86 NORTH AMERICAN FLORA [VoLuME 16 
black spines 4-7 mm. long and clothed with a dense covering of deciduous subcrispate short 
slender grayish-yellow irregularly serrate scales; lamina very ample, deeply tripinnatifid, 
the primary rachis brownish or with age rich purplish-brown and lustrous, with small 
deciduous scales like those of the stipe and squamulose-scabrous with very minute dark- 
brownish substellate scales, glabrescent; pinnae 14 or 15 pairs, alternate, sessile or short- 
petiolate (up to 1.5 cm.), lanceolate, 80-100 cm. long, 16-22 cm. broad, abruptly long- 
acuminate, the secondary rachis suicate and dark-pilose above, below light-brownish or with 
age purplish-brown, with a subsquamulose covering of minute dark substellate scales, a 
few larger light-colored ones subpersistent at the sides, eventually glabrate, lustrous; pin- 
nules 25-33 pairs, approximate, sessile, rigidly herbaceous, bright-green, nearly concolorous, 
patent (or the lower ones retrorse), oblong, 8-11.5 cm. long, 1.5-2.5 cm. broad, the apex 
abruptly caudate and lightly crenate, the costa dark, densely strigose above with dark- 
brown hairs, below laxly short-furfuraceous with grayish-brown stellate squamules and in 
the outer portion rusty-pilose ; segments 23-25 pairs, linear-oblong, 8-12 mm. long, 2-3 
mm. broad above the slightly dilatate base, oblique, parallel, subfalcate, obtuse, the 
margins entire or nearly so, scarcely revolute, the costule clothed with small grayish stel- 
late hairs, these extending along the veins and margins of the segment ; veins 10-13 pairs, 
dark, evident, mostly once-forked near the base; sori 2-8 pairs, seated at the forking of 
the veins; indusium globose, dark-brown, very firm, bearing numerous persistent hairs, 
bursting irregularly into 3 or 4 large erect saccate lobes; receptacle globose, setiferous. 
TYPE LOCALITY: Forests of Tuis, Costa Rica, altitude 650 meters. 
DISTRIBUTION: Costa Rica and eastern Nicaragua. 
40. Cyathea Trejoi Christ, Bull. Herb. Boiss. II. 5: 733. 1905. 
Caudex erect, long and slender, very spiny, without definite scars; rachis stout, 2 cm. 
or more in diameter, stramineous or reddish, unarmed, shining; pinnae articulate, readily 
deciduous, long-petiolate (4 cm. or more), narrowly ovate, 30 cm. or more long, 10 cm. 
broad, acuminate, scarcely narrowed at the base; pinnules about 20 pairs, approximate, 
sessile, articulate, readily separable, lanceolate, 5.5 cm. long, 1.2-1.5 cm. broad, acuminate, 
cut nearly to the costa, the costa scantily yellowish-pilose; segments about 15 pairs, 6-7 
mm. long, about 3 mm. broad, oblong, slightly falcate, obtuse, crowded, separated by a 
very narrow obtuse sinus, slightly dilatate, joined by a very narrow costal wing, dark- 
green above, below paler and subglaucous, the margins lightly and obscurely crenate, the 
costules naked above, below bearing a few hairs near the base; veins about 6-8 pairs, dark, 
mostly simple, glabrous; sori very small, 2 or 3 pairs, close to the costule, occupying the 
basal portion of the segment; indusium grayish, membranous, globose ; receptacle small, 
blackish, scarcely elevated. 
TyPE LOCALITY: San Pablo, State of Chiapas, Mexico, altitude 1500 meters. 
DISTRIBUTION: Known only from the type collection (Munch). 
41. Cyathea patellaris Christ, Ann. Conserv. Jard. Bot. 
Genéve 4: 207. 1900. 
Caudex erect, stout, clothed above with long grayish subulate scales and armed with 
broad dark curved spines; stipe undescribed; rachis stramineous-brownish, unarmed, lightly 
and laxly puberulo-furfuraceous, glabrescent; pinnae oblong-lanceolate, about 60 cm. long, 
15-18 cm. broad, subsessile to short-petiolate (1.5 cm.), short-acuminate, the secondary 
rachis strigose above, below laxly puberulous; pinnules chartaceo-coriaceous, dull-green 
above, paler below, about 35 pairs, subsessile, oblong-lanceolate, 8-9 cm, long, 1.3-1.7 cm. 
broad, deeply pinnatifid into about 18 pairs of segments below the lightly biserrate caudate 
apex, the costa elevated upon both surfaces, strigose above, below minutely squamulose 
toward the base, glabrescent, scantily pubescent toward the apex; segments oblong, sub- 
acute, falcate, 7-9 mm. long, 2.5-3 mm. broad above the dilatate base, connected by a cos- 
tal wing about 1 mm. or more broad, the margins lightly crenate, the costules glabrous 
above, nearly or quite so below; veins evident, 8-10 pairs, mostly once-forked (the lower- 
most and the upper ones often simple), glabrous; sori small, 6-8 pairs, seated at or below 
