psilophyte


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psilophyte

(ˈsɪləˌfaɪt)
n
1. (Environmental Science) any plant that is adapted to grow well in the dry savannah
2. (Palaeontology) any of various extinct primitive plants of the Upper Silurian and Devonian periods, lacking true roots and leaves but having a creeping rhizome and a cylindrical branching stem with a central vascular strand
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.psilophyte - any plant of the order Psilophytales: a savannah plant
tracheophyte, vascular plant - green plant having a vascular system: ferns, gymnosperms, angiosperms
order Psilophytales, Psilophytales - Paleozoic simple dichotomously branched plants of Europe and eastern Canada including the oldest known vascular land plants
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
References in periodicals archive ?
(1980) added the questionable speculation that homworts (e.g., Anthoceros) evolved (devolved?) by reduction from Psilophyte sporophytes and (without explanation of "how"), in the process, lost useful land-plant adaptations (including vascular tissue)--hence, a putative "downgrade," after an "upgrade," development.
1): leptosporangiate ferns, marattioid ferns, psilophytes (adder's tongue ferns, moonworts, and whisk ferns respectively), and horsetails (Smith et al.