Search results
Results from the WOW.Com Content Network
Non-vascular plants are plants without a vascular system consisting of xylem and phloem. Instead, they may possess simpler tissues that have specialized functions for the internal transport of water. [citation needed] Non-vascular plants include two distantly related groups: Bryophytes, an informal group that taxonomists now [update] treat as ...
The Marchantiophyta (/ mɑːrˌkæntiˈɒfətə, - oʊˈfaɪtə / ⓘ) are a division of non-vascular land plants commonly referred to as hepatics or liverworts. Like mosses and hornworts, they have a gametophyte -dominant life cycle, in which cells of the plant carry only a single set of genetic information. It is estimated that there are ...
Although often described as non-vascular plants, many mosses have advanced vascular systems. [8] [9] Like liverworts and hornworts, the haploid gametophyte generation of mosses is the dominant phase of the life cycle. This contrasts with the pattern in all vascular plants (seed plants and pteridophytes), where the diploid sporophyte generation ...
Bryophyte. Bryophytes (/ ˈbraɪ.əˌfaɪts /) [ 1 ] are a group of land plants (embryophytes), sometimes treated as a taxonomic division, that contains three groups of non-vascular land plants: the liverworts, hornworts, and mosses. [ 2 ] In the strict sense, the division Bryophyta consists of the mosses only.
Hornwort. Phaeoceros laevis (L.) Prosk. see Classification. Hornworts are a group of non-vascular Embryophytes (land plants) constituting the division Anthocerotophyta (/ ˌænθoʊˌsɛrəˈtɒfətə, - təˈfaɪtə /). The common name refers to the elongated horn-like structure, which is the sporophyte.
Heterosporyis the production of sporesof two different sizes and sexes by the sporophytesof land plants. The smaller of these, the microspore, is male and the larger megasporeis female. Heterospory evolved during the Devonianperiod from isosporyindependently in several plant groups: the clubmosses, the fernsincluding the arborescent horsetails ...
Sphenophyllum was a slender climbing plant with whorls of leaves, which was probably related both to the calamites and the modern horsetails. Cordaites, a tall plant (6 to over 30 meters) with strap-like leaves, was related to the cycads and conifers; the catkin-like inflorescence, which bore yew-like berries, is called Cardiocarpus. These ...
Gnetophyta (/ n ɛ ˈ t ɒ f ɪ t ə, ˈ n ɛ t oʊ f aɪ t ə /) is a division of plants (alternatively considered the subclass Gnetidae or order Gnetales), grouped within the gymnosperms (which also includes conifers, cycads, and ginkgos), that consists of some 70 species across the three relict genera: Gnetum (family Gnetaceae), Welwitschia (family Welwitschiaceae), and Ephedra (family ...