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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	Devonian
division-name	Sphenophyta
evolution	orgin is largely unknown. May of evolved from the trimerophytophytes. Links to ferns via phylogentic means.
gametophyte	.
habit	.
leaves	.
life-cycle	Homosporous Spores germinate to produce a green, photosynthetic bisexual GT. Can control the sexuality to maximize frequency of outcrossing: Can be male only or start off female then become male.
links	Handy quick reference
members	Equisetum (horsetail)
rhizome	.
roots	.
sporangia	attached to underside of an umbrella-like sporangiophore. Sporangia are clustered in circles to form a strobilis, often found at the end of the fertile stems. A part of the spore wall is an elator and the spores are green.
stems	unique stem. Center has a hollow pith surrounded by carinal canals, vascular bundles then vallecular canals.
stomata	.
traits	.
vascular-system	Unusual Stele

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