Files are available under licenses specified on their description page. Show all show tabs flatfork fern general information. Arbuscular mycorrhizal morphology in sporophyte of psilotum nudum 141 introduction psilotales consists of two genera psilotum and. Psilotum definition is a genus the type of the family psilotaceae of chiefly tropical fern allies with terrestrial or epiphytic habit, slender branching stems, and sessile 3celled sporangia usually in spikes. Psilotum type genus of the psilotaceae genus psilotum fern genus genera of ferns and fern allies family psilotaceae, psilotaceae small family. The record derives from tropicos data supplied on 20120418 which reports it as an accepted name record 26625279 with original publication details.
Note the dichotomously branching stem, minute enations, and lateral synangia which release hundreds of white spores. Plants profile for psilotum complanatum flatfork fern. Feb 15, 2018 this concept was suggested by bierhorst 1956 according to him each unit in synangium represents a condensed fertile axis. Though several species have been reported in psilotum, all of them usually fall into two well defined species, viz. Wikimedia commons ruggiero ma, gordon dp, orrell tm, bailly n, bourgoin t, brusca rc, et al. If the file has been modified from its original state, some details such as the timestamp may not fully reflect those of the original file. Psilotum complanatum, the flatfork fern, is a rare herbaceous epiphytic fern ally in the genus. A plant buff can recognize both species of psilotum p. While every effort has been made to provide the most reliable and uptodate information available, ultimate legal requirements with respect to species are contained in. Psilotum nudum, one of two species in the genus psilotum, is widely distributed across tropical and subtropical areas of the americas, africa, asia and australasia, with a small, endangered population found in southern spain. So then, the apparently redundant name psilotum nudum refers to a really naked, naked plant. Psilotum pronounced zilotum is a lowgrowing plant devoid of any roots or leaves. Morphologically, the plant is simple, lacking leaves and roots, and having hanging stems with dichotomous.
Itis taxonomy is based on the latest scientific consensus available, and is provided as a general reference source for interested parties. All structured data from the file and property namespaces is available under the creative commons cc0 license. Aug 12, 2014 another difference between pterophyta and higher plants is that many species belonging to the pterophyta have a vegetative propagation path by means of rhizomes e. Pdf psilotum hazaricum a new contribution to the flora of pakistan. The distribution of psilotum is tropical and subtropical, in the new world, asia, and the pacific, with a few isolated populations in southwest europe. Media in category psilotum complanatum the following 5 files are in this category, out of 5 total. Both species are indigenous to the hawaiian islands.
The stems and branches have protostele, with a triangularshaped core of xylem. Arbuscular mycorrhizal morphology in sporophyte of. The plant list includes a further 2 scientific plant names of infraspecific rank for the genus psilotum. Eeb greenhouse accession data for psilotum x intermedium. The plant list includes 7 scientific plant names of species rank for the genus psilotum. Psilotum definition of psilotum by the free dictionary. There is some evidence that it might be a true fern that has lost some typically fernlike characteristics. Background information the two native species of moa psilotum spp. Psilotum belong to the whiskfern family psilotaceae with only two wide spread species. An psilotum complanatum in uska species han plantae in nahilalakip ha punoan nga tracheophyta, ngan nga ginhulagway ni olof swartz. Psilotum complanatum placeholder the search results include records for synonyms and child taxa of placeholder link placeholder.
I am particularly interested in macroevolutionary rates and characters that diagnose large clades of ferns and lycophytes. Psilotum and tmesipteris are the only two living genera in this phylum. Psilotum complanatum endangered species listing nsw. Arbuscular mycorrhizal morphology in sporophyte of psilotum nudum.
However, it is not a legal authority for statutory or regulatory purposes. Manual on isolation, identification and sensitivity testing on. This file contains additional information such as exif metadata which may have been added by the digital camera, scanner, or software program used to create or digitize it. Psilotum synonyms, psilotum pronunciation, psilotum translation, english dictionary definition of psilotum. Psilotum complanatum, the flatfork fern, is a rare herbaceous epiphytic fern ally in the genus psilotum. My field work is centered in mexico, colombia, and papua new guinea. On the other hand, psilotum flaccidum, known more as a hawaiian fern ally is also known by the scientific name psilotum complanatum. Anatomical studies were carried out through manual exact cross sectioning of. Pdf psilotum species, is of considerable importance in palaeobotany considering its age of. Page designed through the cooperative efforts of interagency itis teams. This pdf version does not have an isbn or issn and is not therefore effectively. Psilotum complanatum ferns and lycophytes of the world. Three main groups are distinguished within the pterophyta. This is one of two species of the genus that are native to the hawaiian islands.
Psilotum complanatum, the flatfork fern, is a rare herbaceous epiphytic fern ally in. Psilotum complanatum native plants hawaii university of hawaii. Anatomical studies were carried out through manual exact crosssectioning of. Chengdu, sichuan 610041, peoples republic of china. The synangium in psilotum can be considered as homologus to fertile portion of rhynia where one arm is fertile and other is sterile. Moa is chicken, referring to a chickens comb, and reference to the fronds. An psilotum complanatum in nahilalakip ha genus nga psilotum, ngan familia nga psilotaceae. Psilotum complanatum lyman plant house, smith college. Two major sources were used in deciding to list the species at the introduction of the threatened species conservation act in 1995. Common names flatfork fern in english bibliographic references. We do not intend the plant list to be complete for names of infraspecific rank.
Etymology the generic name is from the greek psilos, naked or smooth, alluding to the smooth aerial stems without leaves. Hosted by the usgs core science analytics and synthesis. The stems of the two psilotum species have characteristic features. Psilotaceae of north america update, database version 2011. Thus, psilotum is the only plant in the plant kingdom where the vascular tissues develop in the gametophytic generation. Both these species differ in their distribution and general description. Falanruw, and mariehelene sachet introduction micronesia figure 1 consists of a group of archipelagoes in the western tropical pacific ocean, all made up of very small islands hence the name micronesia.
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