Akiaki! Aki Mimoto's little place on the web

Biology 337: Divisions ( Glossary \| Divisions )
Taken Spring 2005, with Dr. Plant. Information here is based primarily upon notes from class but some from external sources like the web.

age	.
division-name	Psilotophyta
evolution	May be related to modern ferns. Obscure as it is poorly represented in fossil record
gametophyte	Psilotum: spores germinate to a bisexual gametophyte that is subterranean and associated with a mycorrhizal fungus. Very hard to see. Archegonia and Antheridia arise randomly on the surface of gametophyte.
habit	.
leaves	None
life-cycle	Homosporous
links	More Life-cycles Handy quick reference
members	2 living genera. Psilotum, Tmesipteris
rhizome	Underground, associated with a mycorrhizal fungis. Rhyzoids are involved in water uptake.
roots	None
sporangia	Psilotum: sporangia are located at tips of short lateral branches. Called a synangium.
stems	Simple dichotmously branched aerial stems. Is photosynthetic. Has enations (small outgrowths)
stomata	.
traits	.
vascular-system	Protostele. Simplest living vascular plants. Psilotum: Xylem core surrounded by phloem. Maturation of xylem is centripetal.

Copyright 2005 by Aki Mimoto (amimoto+discontinu[at]gmail.com). Some rights reserved.
akiaki Hosting courtesy of Gossamer Host