Parr 1, 1909] CYATHEACEAE 83 
costa brownish-pilose above, below sparingly puberulo-squamose and with a few broad 
delicate whitish caducous scales; segments 18-20 pairs, slightly falcate, linear-oblong, 
obtuse, up to 1.3 cm. long and 4 mm. broad, slightly dilatate, the lowermost a little apart, 
all connected by a narrow wing, the margins subentire or obscurely crenate, reflexed, ciliate, 
the costules with afew minute pallid scales like those of the costa; veins 10-12 pairs, mostly 
once-forked close to the costule, mainly soriferous, bearing a few short scattered hairs, a 
few also between the veins; sori 8-10 pairs, large, globose, greenish-yellow, close to the 
costule ; indusium delicately membranous, completely investing the sporangia, diaphanous, 
rupturing irregularly, the lacerate fragments mixed among the crowded sori, at length 
mostly disappearing; receptacles large, somewhat elevated, appearing more so from the 
thick rugose character of the leaf-tissue beneath. 
TYPE LOCALITY : Costa Rica. 
DISTRIBUTION: Interior mountain region of Costa Rica, up to nearly 2000 meters elevation, 
upon partially open slopes. 
33. Cyathea suprastrigosa (Christ) Maxon. 
Hemitelia suprastrigosa Christ, in Pittier, Prim. Fl. Costar. 3: 44. 1901. 
Cyathea conspicua Christ, Bull. Herb. Boiss. II. 6: 178. 1906. 
Caudex erect, slender, the base conical from the presence of aerial roots, the upper 
portion clothed with lustrous bright-brown elongate scales (15 mm. long) between the 
closely tesselate rounded scars (3 cm. in diameter) ; fronds rather small, the stipe clothed 
at the base with bright-brown lanceolate-subulate scales up to 3.5 cm. long and there 
bearing numerous very short conical spines, above nearly or quite unarmed and, together 
with the primary rachis, brownish-yellow, minutely furfuraceous; lamina deeply tripin- 
natifid, the leaf-tissue chartaceo-coriaceous, dull-green above, paler below; pinnae about 
50 cm. long, 14-19 cm. broad, subsessile, oblong-lanceolate, acuminate, the secondary 
rachis dull-yellowish, sulcate, laxly and deciduously furfuraceous; pinnules 22-25 pairs, 
sessile, approximate, spreading, 7-11 cm. long, 1.5-2.5 cm. broad, oblong-lanceolate, very 
deeply pinnatifid, the apex acuminate-caudate, serrate, the costa densely brownish-strigose 
above, below bearing a few appressed whitish or pale-yellowish ovate to ovate-lanceolate 
deciduous scales; segments 15-18 pairs, elongate-oblong, falcate, 8-13 mm. long, 34 mm. 
broad, obtuse, dilatate, separated by an acute sinus 2-3 mm. broad, the margins more or 
less revolute, sharply bicrenate-serrate; costules very scantily and deciduously pilose 
above and with 2 or 3 stiffer subpersistent hairs at the apex, below conspicuously light- 
paleaceous, the scales bullate, erose-lacerate, and somewhat imbricate; veins about 10 pairs, , 
once-forked below the middle, obscurely setulose below, above bearing a few very slender 
lax tortuous hairs, these scarcely persistent ; sori large, 6-8 pairs, seated near the costule, 
confluent at maturity; indusium globose, thin, dark-grayish, bursting irregularly, only 
the lower portion commonly persistent ; receptacle dark-brownish, elevated, broadly cap- 
itate, setiferous. 
TYPE LOCALITY: Forests of Achiote, volcano Poas, Costa Rica, altitude 2200 meters. 
DISTRIBUTION : Known only from the volcanoes Poas, Irazfi and Turrialba, Costa Rica, at from 
2000 to 2350 meters altitude. 
34. Cyathea aphlebioides Christ, Bull. Herb. Boiss. II. 6: 179. 1906. 
Caudex undescribed ; stipe stout, 2.5 cm. in diameter at the base, ochraceous, shining, 
armed with numerous almost spirally arranged stout conical subintrorse spines about 5 
mim. long and clothed at the base with shining blackish scales more than 1 cm. long with 
whitish ciliate-lacerate margins ; rachises dark-purplish, the uppermost portions reddish- 
stramineous, slightly rugose, nearly smooth; lower pinnae deflexed, 30 cm. long, with 
abortive irregularly incised pinnules scarcely 3 cm. long; characteristic pinnae up to 50 
cm. long, 17 cm. broad, short-petiolate, acuminate, scarcely narrowed at the base ; pinnules 
about 35 pairs, close, sessile, about 9.5 cm. long, 1.8 cm. broad, very deeply pinnatifid, 
the apex linear-caudate, dentate ; costae and costules sparingly clothed below with decidu- 
ous bullate ovate erose-lacerate ferruginous scales, with yellowish-white hairs intermixed ; 
segments about 20 pairs, 9-10 mm. long, about 3mm. broad at the base, close, falcate, sub- 
