psilotum - Psilotum is a genus of rootless dzawil furudh rhizomatous perennial herbs with simple leaves and sporangia Learn about its evolution distribution economic importance and phylogenetic position in the Psilotaceae family and the Pteridophyta class Psilotaceae Wikipedia Whisk fern Ferns Psilotum Vascular Plants Britannica Psilotum nudum Wikipedia Psilotum is a genus of fernlike vascular plantsIt is one of two genera in the family Psilotaceae commonly known as whisk ferns the other being TmesipterisPlants in these two genera were once thought to be descended from the earliest surviving vascular plants but more recent phylogenies place them as basal ferns as a sister group to Ophioglossales Psilotum Features Reproduction and Phylogeny Biology Discussion In contrast Psilotum flaccidum is a rarer species with a more limited distribution This species can be found in Mexico Jamaica and several Pacific islands where it inhabits similar ecological niches as P nudum but is less commonly encountered P flaccidum is notable for its pendulous growth form which can extend up to 90 cm in length allowing it to adapt to various vertical spaces Whisk fern is a primitive fern genus with two species and one hybrid that lack true leaves and roots It belongs to the order Psilotales and the class Psilotopsida of the division Pteridophyta Psilotum is a plant with a rhizome and an aerial shoot that resembles a fern It has two species P nudum and P flaccidum that are distributed in tropical and tbc usus subtropical regions Learn about its morphology anatomy phylogeny and spore formation Psilotum Distribution and Phylogeny Botany Biology Discussion Psilotum and Tmesipteris resemble the earliest known SilurianDevonian vascular plants Rhyniopsida in the following characteristic features 1 The sporophytes are dichotomously branched with subterranean rhizome and upright branches 2 Absence of roots and sporophytic generation bears rhizoids Psilotum Distribution Structure Reproduction Biology Learner Psilotum an overview ScienceDirect Topics Psilotum is a genus of whisk ferns that belong to the order Psilotales Learn about its distribution structure reproduction and taxonomic position in this article Introduction to the Psilotales University of California Museum of Psilotum Structure Morphology Anatomy Reproduction Life Cycle Psilotum Wikipedia Psilotum is a tropical or subtropical plant that lacks roots and leaves and produces spores on fused sporangia It has a complex life cycle involving a saprophytic gametophyte and a photosynthetic sporophyte and is related to Tmesipteris Psilotaceae is a family of ferns with two genera Psilotum and Tmesipteris and about a dozen species Psilotum includes the whisk ferns small shrubby plants of the dry tropics while Tmesipteris is an epiphyte with phylloclades Psilotum nudum the whisk fern 3 is a fernlike plant Like the other species in the order Psilotales it lacks roots 4 Its name Psilotum nudum means bare naked in Latin because it lacks or seems to lack most of the organs of typical vascular plants as a durian lay result of evolutionary reduction
nonton77
policrepe
