Webnoun. : a cystoid structure. specifically : a mass resembling a cyst but lacking a membrane. called also pseudocyst. WebDec 10, 2008 · The placement of Megalastrum lasiernos among cyatheoid ferns is morphologically supported by the presence of mound-like receptacles, paraphyses, large sessile sporangia, wide oblique annuli, and trilete spores. These reproductive characters, although numerous, are easily overlooked and are mostly obscured by the dense …
Spore Morphology of the Pteridaceae IV. Taxonomic and …
Web(Plants) a member of an order of plants with woody stems and tough leaves that became extinct during the Cretaceous period Cyatheaceae are the largest family of tree ferns, including about 640 species. [1] Cyatheaceae and Dicksoniaceae, together with Metaxyaceae and Cibotiaceae, do not form a strongly supported monophyletic group and could be paraphyletic, but several individual subgroups are well supported as being monophyletic. See more The Cyatheaceae are a family of ferns, the scaly tree ferns, one of eight families in the order Cyatheales in the Pteridophyte Phylogeny Group classification of 2016 (PPG I). Alternatively, the family may defined much more … See more As of 2024 , two different circumscriptions of the family Cyatheaceae are used, as summarized in the table below. In the Pteridophyte Phylogeny Group classification of … See more • Tree ferns:Monophyletic groups and their relationships as revealed by four protein-coding plastid loci • Palacios-Rios, M. 2007. See more can u swapfuntions of ur mouse buttons
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WebSep 15, 2016 · A synopsis of all Neotropical species of Cyathea with bipinnate fronds is presented. This artificial group includes 27 species with entire or very shallowly lobed pinnules. The provided key includes together, for the first time, species that had been previously treated in three different genera: Sphaeropteris, Trichipteris, and Cyathea. Full … WebJan 16, 2024 · alate; indusia cyatheoid to subsphaeropteroid ..... C. bettinae 26 Petiole scales entirely whitish to pale yellowish brown or bicolorous with margins of this color, strongly contrasting with b rown Webamong cyatheoid ferns is morphologically supported by the presence of mound-like receptacles, paraphyses, large sessile sporangia, wide oblique annuli, and trilete spores. These reproductive characters, although numerous, are easily overlooked and are mostly obscured by the dense pubescence of the laminae. The petiole scales of Megalastrum ... can us visa holders travel to philippines