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In the more familiar seed plants, the haploid generation is represented only by the tiny pollen and the ovule, while the diploid generation is the familiar tree or other plant. [15] Another unusual feature of the liverwort life cycle is that sporophytes (i.e. the diploid body) are very short-lived, withering away not long after releasing spores ...
Marchantia polymorpha is a species of large thalloid liverwort in the class Marchantiopsida. [ 1 ]M. polymorpha is highly variable in appearance and contains several subspecies. [ 2 ] This species is dioicous, having separate male and female plants. [ 2 ]M. polymorpha has a wide distribution and is found worldwide. [ 3 ]
Antheridium. General structure of antheridia. Antheridia consist of a thin cellular layer that holds many sperm inside. Here, the diagram of a liverwort antheridium is shown. An antheridium is a haploid structure or organ producing and containing male gametes (called antherozoids or sperm). The plural form is antheridia, and a structure ...
Alternation of generations (also known as metagenesis or heterogenesis) [1] is the predominant type of life cycle in plants and algae. In plants both phases are multicellular: the haploid sexual phase – the gametophyte – alternates with a diploid asexual phase – the sporophyte. A mature sporophyte produces haploid spores by meiosis, a ...
Anemone hepatica (syn. Hepatica nobilis), the common hepatica, liverwort, [2] liverleaf, [3] kidneywort, or pennywort, is a species of flowering plant in the buttercup family Ranunculaceae, native to woodland in temperate regions of the Northern Hemisphere. This herbaceous perennial grows from a rhizome.
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.
Marchantia is a genus of liverworts in the family Marchantiaceae and the order Marchantiales. The thallus of Marchantia shows differentiation into two layers: an upper photosynthetic layer with a well-defined upper epidermis with pores and a lower storage layer. The thallus features tiny cup-like structures called gemma cups, containing gemmae ...
Some liverworts, such as Marchantia, have a cuticle, and the sporophytes of mosses have both cuticles and stomata, which were important in the evolution of land plants. [ 3 ] All land plants have a life cycle with an alternation of generations between a diploid sporophyte and a haploid gametophyte , but in all non-vascular land plants, the ...