Search results
Results from the WOW.Com Content Network
Many club-moss gametophytes are mycoheterotrophic and long-lived, residing underground for several years before emerging from the ground and progressing to the sporophyte stage. [4] Lycopodiaceae and spikemosses (Selaginella) are the only vascular plants with biflagellate sperm, an ancestral trait in land plants otherwise only seen in bryophytes.
The club-shaped appearance of these fertile stems gives the clubmosses their common name. Lycopods reproduce asexually by spores. The plants have an underground sexual phase that produces gametes , and this alternates in the lifecycle with the spore-producing plant.
Lycopodium clavatum (common club moss, [3] [4] stag's-horn clubmoss, [5] running clubmoss, [6] or ground pine [7]) is the most widespread species in the genus Lycopodium in the clubmoss family. Description
The lycophytes, when broadly circumscribed, are a group of vascular plants that include the clubmosses.They are sometimes placed in a division Lycopodiophyta or Lycophyta or in a subdivision Lycopodiophytina.
Date/Time Thumbnail Dimensions User Comment; current: 23:10, 25 December 2007: 488 × 736 (127 KB): Kateshortforbob {{Information |Description= new version of this file to correct a minor typo, as requested at WP:HD#Something is spelled wrong and I can't find the "edit" link! |Source= Original image by User:LadyofHats, altered image by User:Kateshortforbob
The club mosses commonly grow to be 5–20 cm tall. [4] The gametophytes in most species are non-photosynthetic and myco-heterotrophic, but the subfamily Lycopodielloideae and a few species in the subfamily Huperzioideae have gametophytes with an upper green and photosynthetic part, and a colorless lower part in contact with fungal hyphae.
Diagram showing the alternation of generations between a diploid sporophyte (bottom) and a haploid gametophyte (top) Alternation of generations (also known as metagenesis or heterogenesis) [1] is the predominant type of life cycle in plants and algae.
Huperzia is a genus of lycophyte plants, sometimes known as the firmosses or fir clubmosses; the Flora of North America calls them gemma fir-mosses. [2] This genus was originally included in the related genus Lycopodium , from which it differs in having undifferentiated sporangial leaves, and the sporangia not formed into apical cones.