Vascular Plant


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Vascular Plant

 

a plant whose organs contain vessels or tracheids, which conduct water and dissolved mineral salts, and sieve tubes, which conduct organic matter. Vascular plants include the Psilotophyta, Lycopodiophyta, Equisetopsida, Pterido-phyta, Gymnospermae, and Angiospermae, that is, all higher plants except mosses and liverworts. In these exceptions, the overall reduction of the sporophyte is also reflected in the disappearance of the conducting system typical of higher plants. In certain older plant classifications, a special taxonomic group of cryptogamic vascular plants was distinguished; it included the Psilotophyta, Lycopodiophyta, Equisetopsida, and Pteridophyta.

References in periodicals archive ?
The phytocoenosis is characterised by a low number of three to eight vascular plant species per releve (mean ca.
I first observed it growing epiphytically and endophytically on the leaves of two different flowering vascular plants, Magnolia and Vibernum, along the I-10 corridor in Hancock County, Mississippi.
Team Report summary Amphibians & Reptiles 20 species Bees 37 species (20 new county records) Beetles 73 species, 19 families Birds 122 species Butterflies 48 species Dragonflies & 21 dragonfly species Damselflies (7 county records) 9 damselfly species (6 county records) Fish and Freshwater 39 fish species, Mussels 4 freshwater mussels Fungi 4 species (+ 1 species water mold) Macroinvertebrates & 16 families of Plankton macroinvertebrates 18 genera of plankton Mammals 27 species Moths 74 species (+ 6 unidentified) (3 state and 59 new county records) Non-vascular plants 0 species Snail-killing flies 4 species Vascular Plants 379 species (123 potential new county records)
It can be noted that the total dose rate value of vascular plants compared with that of other reference organisms is the largest and reaches 4.
Only 59 vascular plant species were found during this study (9 trips over a two year period) compared to 65 recorded by Kilburn and Ford (1963).
In June 2007 the composition and coverage of vascular plant species of the field layer and bryophyte species of the surface layer were recorded in 23 releves 1 m x 1 m in size along three transects (Fig.
Altogether 113 vascular plant and 19 moss species were described on 56 plots within 14 experimental areas in the hybrid aspen plantations of Aidu opencast and on former agricultural land.
Nearly a quarter of vascular plant varieties in Japan are endangered after a recent environmental report added 265 kinds to the list of such plants in peril, the Environment Agency said Wednesday.
44 percent of all vascular plant species and 35 percent of all terrestrial vertebrate species appear to be confined to just 25 "hotspots," which cover only 1.
In this discussion, "endangered" (E) refers to any state-native vascular plant taxon that, based on scientific research and field work, is believed to be or is in danger of becoming extinct or extirpated from all or a large part of the state in the immediate or foreseeable future if not given some type of protection or critical habitat designation (Arkansas Natural Heritage Commission 1987; Freeman et al 1979).
Revised Breeding Bird (1996) and Vascular Plant Lists (1999) now assist in the identification of E.
If Equisetites actually were Equisetum, then Equisetum has existed since the Paleozoic and may indeed be the oldest extant vascular plant genus (Hauke, 1963).