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In a vascular plant, the stele is the central part of the root or stem [1] containing the tissues derived from the procambium. These include vascular tissue, in some cases ground tissue and a pericycle, which, if present, defines the outermost boundary of the stele.
The four primary axes of Stigmaria dichotomize often, forming an extensive underground system possibly ranging up to 15 m (49 ft) in radius. The rootlets range in size, being up to 40 cm (16 in) long and 0.5–1 cm (0.20–0.39 in) wide, and typically taper distally and do not dichotomize.
1 Books. 2 Journal articles. Toggle Journal articles subsection ... 2.4 Asplenium. 3 Websites. Toggle the table of contents. Wikipedia: WikiProject Pteridophytes ...
The forking of the bundle system starts near the base of a terminal cone, which remains erect, of the sympodial development in certain branches. The last method is when "adventitious buds appear in the cortical tissue closely connected with the stelar system of the trunk, and these buds continue their development like typical stems".
The Polypodiidae, commonly called leptosporangiate ferns, formerly Leptosporangiatae, are one of four subclasses of ferns, the largest of these being the largest group of living ferns, including some 11,000 species worldwide.
President-elect Donald Trump complained on Friday that American flags would still be lowered to half-staff in honor of the late President Jimmy Carter during Trump's Jan. 20 inauguration.
The Kubitzki system is a system of plant taxonomy devised by Klaus Kubitzki, and is the product of an ongoing survey of vascular plants, entitled The Families and Genera of Vascular Plants, and extending to 15 volumes in 2018. [1]
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