Unformatted text preview: genera. (Lycopodiums are commonly called ground pines and club mosses) Selaginellae Genus: (Commonly called spike mosses or ground mosses) Isoetae Genus: (Commonly called quillworts) Characteristics of the Lycophyta The Lycophyta have vascular stems and adventitious, vascular roots. They have microphylls, leave with a single vascular trace (one vein). In most Lycophyta the leaves are spirally arrange along the stem. Some species have 2 or 4-ranked leaves and some Lycopodiums and species have flattened stems and leaves. The sporangia are located in the axils of modified leaves, called sporophylls (spore-bearing leaves). The sporangia may be axillary, along the stem or cluster to form a terminal strobilus. The Lycopodiae are homosporous. The Selaginellae and Isoetae are heterosporous. Lycopodium...
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- Fall '09
- Plants, Fern, Lycophyta, Lycopodiophyta