pteridophyte - definizione. Che cos'è pteridophyte
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Cosa (chi) è pteridophyte - definizione

DIVISION OF PLANTS
Pteridophyta; Pteridophytes; Seedless vascular plant; Pteriodophytes
  • Pteridophyte life cycle

pteridophyte         
['t?r?d?(?)f??t]
¦ noun Botany a flowerless plan of the division Pteridophyta, which comprises the ferns, horsetails, and clubmosses.
Origin
from mod. L. Pteridophyta, from Gk pteris, pterid- 'fern' + phuton 'plant'.
Pteridophyte         
A pteridophyte is a vascular plant (with xylem and phloem) that disperses spores. Because pteridophytes produce neither flowers nor seeds, they are sometimes referred to as "cryptogams", meaning that their means of reproduction is hidden.
Pteridophyte Phylogeny Group         
PPG I
The Pteridophyte Phylogeny Group, or PPG, is an informal international group of systematic botanists who collaborate to establish a consensus on the classification of pteridophytes (lycophytes and ferns) that reflects knowledge about plant relationships discovered through phylogenetic studies. In 2016, the group published a classification for extant pteridophytes, termed "PPG I".

Wikipedia

Pteridophyte

A pteridophyte is a vascular plant (with xylem and phloem) that disperses spores. Because pteridophytes produce neither flowers nor seeds, they are sometimes referred to as "cryptogams", meaning that their means of reproduction is hidden. Ferns, horsetails (often treated as ferns), and lycophytes (clubmosses, spikemosses, and quillworts) are all pteridophytes. However, they do not form a monophyletic group because ferns (and horsetails) are more closely related to seed plants than to lycophytes. "Pteridophyta" is thus no longer a widely accepted taxon, but the term pteridophyte remains in common parlance, as do pteridology and pteridologist as a science and its practitioner, respectively. Ferns and lycophytes share a life cycle and are often collectively treated or studied, for example by the International Association of Pteridologists and the Pteridophyte Phylogeny Group.