FIGURE 4. A–E in A new hybrid and further taxonomic notes on Brazilian tree ferns (Cyatheaceae)

FIGURE 4. A–E. Cyathea mexiae (Schwartsburd 2983 [VIC]): A. Base of petiole, showing aculei, scales, and scurf. B. Petiolar aculei and scurf. C. Medial pinna. D. Rachis, pinna-rachis, and pinnules, abaxially, showing sericeous axes and sessile pinnules. E. Segment, abaxially, showing sori, hairs, and bullate scales on costule. F–J. Alsophila salvinii (Schwartsburd 3369 [VIC]): F. Base of petiole, showing scales and broken-off aphlebiae. G. Entire aphlebia with laminar expansions. H. Broken-off aphlebia without laminar expansion. I. Medial pinna. J. Rachis, pinna-rachis, and pinnules, abaxially, showing scurf, scales, and segments.