Alsophila imrayana (Hook.) Conant

Cyathea imrayana Hook. Sp. Fil. 1 : 18. 1844
Caudex stout, erect, paleaceous at the summit; stipe short, slightly aculeate, very densely and closely dark rusty-furfuraceous, paleaceous at base ; lamina ample, 2-3 meters long, 1.2-1.3 meters broad, ovate, very abruptly acuminate, tripinnate, coriaceous, very dark-green above, light yellowish-green and glaucous below ; primary and secondary rachises very stout, brownish to purplish beneath a dense harsh persistent conspicuous covering of small rusty-brown squamules and small linear scales; pinnae 60 cm. or more long, 18-20 cm. broad, sessile or nearly so, linear-oblong, abruptly acuminate, the apex deeply serrate; pinnules about 35 pairs, approximate or contiguous, sessile, spreading, 10-11 cm. long, about 1.8 cm. broad, fully pinnate, the apex long-acuminate, the costae densely furfuraceous and in the lower half clothed with small linear light-brownish striped scales ; segments about 25-28 pairs, linear -oblong, falcate, close, fully adnate, 9-10 mm. long, 3 mm. or less wide, the margins refleied, subentire, faintly crenate at the obtuse apex, the costules below densely rusty-furfuraceous, obscurely rusty-pilose ; veins close, distinct, about 12-15 pairs, once-forked at the base ; son 1 to several pairs, close to the costule, usually extending half the length of the segment; indusia globose, reddish-brown, fragile, membranous, rupturing irregularly ; receptacle globose, dark, closely puberulo-furfuraceous.
Type locality: Couliaban Mountain, Dominica. Distribution : Guadeloupe, Dominica, and Martinique.

Cyathea caribaea Jeuman, Ferns Brit. W. Ind. 57. 1898
Caudex erect, about 6 meters high ; fronds spreading, very ample, sometimes more
than 4 meters long ; stipe stout, with large spines below ; primary rachis stout, purplish,
slightly furfuraceous ; pinnae 60 cm. or more long, 18-23 cm. broad, oblong, sessile, abruptly
acuminate, very dark-green above, lighter and glaucous below, coriaceous, the secondary
rachis stout, firm, purplish, polished, lightly and very minutely light brownish-furfuraceous;
pinnules very numerous, approximate, sessile, 8-12 cm. long, 1.3-2 cm. broad, deeply cut
almost to the costa into about 22-28 pairs of segments below the subcaudate serrate apex ;
segments elongate-oblong, falcate, close or the lower ones a little apart, 7-10 mm. long,
about 2.5-3 mm. broad, slightly dilatate, the margins reflexed, subentire, or at the obtuse
apex crenulate ; costae yellowish-brown, pilose on both surfaces, the lower also minutely
stellate-squamose and with a few slender dark-brown striped deciduous scales, the costules
pilose and similarly squamulose ; veins 8-10 pairs, mostly once-forked close to the costule,
casually simple or twice-forked ; sori 2-4 pairs, basal on the veins and confined to the base
of the segments; indusium globose, delicate, yellowish-brown, bursting irregularly, the
large divisions scarcely persistent ; receptacle elevated, slightly capitate, setiferous.
Type locality : St. Vincent.
Distribution : Known definitely only from St. Vincent.

Alsophila imrayana, synonym Cyathea imrayana, is a species of tree fern native to Dominica, Costa Rica, Panama, Venezuela, and Ecuador.

The plant grows in submontane rain forest understorey and riparian zones on riverbanks, at an altitude of 1,000–2,000 metres (3,300–6,600 ft).

Alsophila imrayana là một loài thực vật có mạch trong họ Cyatheaceae. Loài này được (Hook.) D.S. Conant mô tả khoa học đầu tiên năm 1983.