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Psilotaceae
Tmesipteridaceae
Zosterophyllopsida†

Psilotophyta (a "whisk ferns"; too another time when Psilophyta) occurs as division (i.e., phylum) of the Kingdom Plantae. This section contains merely deuce genera, Psilotum, the little fruticose plant of the dry tropics, & Tmesipteris, an epiphyte found in Australia, New Zealand, and New Caledonia. There has hanker been contention just about a relationships of the Psilotophyta, using a few claiming that it is ferns (Pteridophyta), and others maintaining that it is descendent of the foremost vascular plants. Recent grounds to believe from either DNA suggests a nigher affinity to the ferns.

A lot Psilotophyta part two or three characteristics. Psilotophyta come vascular plants. It lack leaves, instead getting little outgrowths known as enations. the enations are non considered avowedly leaves because there exists exclusively a vascular bundle good underneath the two, but not around, when in leaves. Psilotophyta likewise don't keep around admittedly roots. It is anchored by rhizoids. Absorption is aided by symbiotic fungi called mycorrhizae.

3 sporangia are united into a synangium, which is considered to exist as the super decreased series of branches. There is a heavy tapetum to nourish a underdeveloped spores, as is average of eusporangiate plants. A gametophyte looks like the little piece of subterranean stem, however green goods antheridia and archegonia.

Psilotaceae
Division/family description and thumbnail links to images of two species of Psilotum from Hawaii.

Phylum Psilophyta
Includes phylum description, and links to images of members of the Psilotaceae.

Division Psilotophyta
Description with links to images of Psilotum nudum and Tmesipteris tannensis.

Classification of Psilotophyta
Main entry in Systema Naturae 2000.

Fork Ferns
Illustrated introduction to the five species of Psilotaceae found in New Zealand.

Introduction to the Psilotales
Includes descriptions of morphology and life history.

Psilophyta
Profusely illustrated description focussed on morphology and evolution.

Psilotaceae
Description and illustration of anatomical structure of species in Hawaii


Science: Biology: Flora and Fauna: Plantae: Pteridophyta






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