nomenclatorial act:
subsequent publication
Page:
106
diagnosis:
Gymnospermous plants with megasporophylls consisting of bract/scale complexes in which the fertile scales - from compound radially symmetrical to simple bilateral symmetrical - occur free to almost fully fused in the axils of sterile bracts. Male: cones compact, unisexual, helical, smaller and morphologically more conservative than ovulate cones, with simple microsporophyll units comprising scale and 2 to several microsporangia; pollen unisulcate, dissacate to nonsaccate. Foliage: helical, scale-like to linear, with simple midvein to several parallel and forking veins.
systematic position:
Gymnosperms
Classification:
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