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Progymnospermophyta; Fossil range: Middle Devonian to Mississipian
	Archaeopteris
Scientific classification
Kingdom:	Plantae;
Subkingdom:	Embryophyta;
Division:	†Progymnospermophyta;
Class:	†Progymnospermopsida;
Orders
	Order Aneurophytales; Order Protopityales; Order Archaeopteridales; ;

Progymnospermophyta is an extinct division of Paleozoic plants. Its sole class is Progymnospermopsida.

[edit] Characteristics

Vascular cambium with unlimited growth potential is present as well as xylem and phloem.
Ancestors of the earliest seed plants as well as the first true trees.
Superficially conifer/spruce-like in appearance.
Strong monopodial growth is exhibited.
Macrophylls present as well as simple leaves.
Some were heterosporous but others were homosporous.

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