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A proposed phylogeny of the vascular plants after Kenrick and Crane 1997 [15] is as follows, with modification to the gymnosperms from Christenhusz et al. (2011a), [16] Pteridophyta from Smith et al. [17] and lycophytes and ferns by Christenhusz et al. (2011b) [18] The cladogram distinguishes the rhyniophytes from the "true" tracheophytes, the ...
Rhynia gwynne-vaughanii was the sporophyte [2] generation of a vascular, axial, free-sporing diplohaplontic embryophytic land plant of the Early Devonian that had anatomical features more advanced than those of the bryophytes. Rhynia gwynne-vaughanii was a member of a sister group to all other eutracheophytes, including modern vascular plants.
Curled up Selaginella tamariscina Wallace's Selaginella (Selaginella wallacei). Selaginella, also known as spikemosses or lesser clubmosses is a genus of lycophyte.It is usually treated as the only genus in the family Selaginellaceae, with over 750 known species.
Bryophytes are characteristically limited in size and prefer moist habitats although some species can survive in drier environments. [4] The bryophytes consist of about 20,000 plant species. [5] [6] Bryophytes produce enclosed reproductive structures (gametangia and sporangia), but they do not produce flowers or seeds.
Seedless tracheophytes vs. angiosperms [ edit ] Current hypotheses suggest that gametophytic selection in early seedless land plants would have seen negative repercussions due to the limitations imposed by environmental selection on independent gametophytes , like those of bryophytes and ferns.
The division of the extant tracheophytes into three monophyletic lineages is supported in multiple molecular studies. [ 4 ] [ 5 ] [ 6 ] Other researchers argue that phylogenies based solely on molecular data without the inclusion of carefully evaluated fossil data based on whole plant reconstructions, do not necessarily completely and ...
In all bryophytes, the primary plants are the haploid gametophytes, with the only diploid portion being the attached sporophyte, consisting of a stalk and sporangium. Because these plants lack lignified water-conducting tissues, they cannot become as tall as most vascular plants. Algae, especially green algae. The algae consist of several ...
The clade includes all land plants (embryophytes) except for the bryophytes (liverworts, mosses and hornworts) whose sporophytes are normally unbranched, even if a few exceptional cases occur. [1] While the definition is independent of the presence of vascular tissue , all living polysporangiophytes also have vascular tissue, i.e., are vascular ...