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 WebAug 28, 2014 · A part of the compressed tree fern axis with leaf and adventitious root scars in unusual arrangement from Plio–Pleistocene sediments of Arunachal Pradesh, India is described as Cyathea siwalika sp. nov. This record suggests that Cyathea was an important component of tropical evergreen forest in the area during the Plio–Pleistocene and this …
75th Abstracts -- Abstract 2
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 ... Web(a) Cyatheoid arrangemement of vascular bundles within the leaf scar. Scale bar = 1 cm. (b)Stem surface showing the marks of root traces within root (marked by red arrow). subcutaneous site of administration
American Journal of Botany - Botanical Society of America
WebMay 13, 2013 · Commonly known as the scaly tree ferns, Cyatheaceae are a clade of ca. 600 plant species within a group of plants known as the monilophytes or ferns (Smith et al. 2006). All ferns are spore-bearing and share a highly distinctive vasculature system – with protoxylem confined to lobes of the xylem strand in a “necklace-like” arrangement or … WebJun 4, 2013 · and some cyatheoid ferns 4 , in cyatheoid. members 5 , Stauropteris burntislandica 6 , Ankyropteris corrugata, on the petiole. or rachis as in Asterochlaena laxa, Botryopteris. antigua, or on both stem and. petiole or rachis as in Ankyropteris. grayi, A. glabra and Botrychioxylon. paradoxum 7 and in Cladoxylon radiatum. 8 , but without a … Webathetoid: [ ath´ĕ-toid ] 1. resembling athetosis. 2. affected with athetosis. pain in leg from hip to toes