Cyathea insignis

Comprehensive Description

provided by North American Flora
Cyathea insignis D. C. Eaton, Mem. Am
Acad. II. 8: 216. 1860.
Caudex stout, 5-6 meters high, 10-15 cm. in diameter, unarmed, densely clothed at the summit with linear spinulose-ciliate cinnamon -brown matted scales ; fronds wide-spreading ;
stipe 30-60 cm. long, stout, strongly curved, unarmed but eventually scabrous from the very dense covering of spreading or retrorse scales like those of the candex, naked with age,
toward the base reddish-brown , above mottled reddish and yellowish ; lamina 2-2 . 5 meters long, 1-1.25 meters broad, very deeply tripinnatifid, feubcoriaceous, dark-green above, paler and decidedly glaucous below ; primary rachis similar to the upper stipe, moderately paleaceous, glabrescent, flexuous toward the apex ; secondary rachises similar, yellowish, rustytomentose above, finely scabrous below ; pinnae alternate, sessile, approximate or slightly overlapping, 45-75 cm, long, 15-20 cm. broad, oblong-lanceolate, decurved in the outer part, the apex abruptly acuminate ; pinnules 25-28 pairs, close, patent or the lower ones decurved, sessile, linear-lanceolate, 7.5-10 cm. long, 1.3-1.8 cm. broad, a little enlarged at the base, incised to the costa nearly throughout, the apex commonly attenuate or subcaudate, crenate-serrate ; costae and costules with numerous laciniate cinnamomeous scales ; segments 17-20 pairs, 7-9 mm. long, 3-4 mm. broad, oblong, oblique, close, falcate, entire or the lowermost crenately incised, these enlarged and overlapping the rachis, deeply excised at the inner base ; veins 7-10 pairs, mostly once-forked, nearly glabrous; sori 4-8 pairs, medial or inframedial, nearly covering the segment, seated at or below the forking of the veins; indusia subglobose, papyraceous, whitish, conspicuous, at first completely enveloping the sporangia, at maturity opening outward and readily breaking up into several irregular subpersistent segments ; receptacle short, inconspicuous.
Type locality : I^a Guinea, eastern Cuba.
Distribution : Eastern Cuba and Jamaica. Apparently rare in Cuba ; in Jamaica not uncommon at certain points in the Blue Mountains, at from 900 to 1800 meters elevation, growing in open or moist shaded situations.
bibliographic citation
Lucien Marcus Underwood, Ralph Curtiss BenedictWilliam Ralph Maxon. 1909. OPHIOGLOSSALES-FILICALES; OPHIOGLOSSACEAE, MARATTIACEAE, OSMUNDACEAE, CERATOPTERIDACEAE, SCHIZAEACEAE, GLEICHENIACEAE, CYATHEACEAE (pars). North American flora. vol 16(1). New York Botanical Garden, New York, NY
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