 the division lycopodiophyta (sometimes called lycophyta or lycopods) is a tracheophyte subdivision of the kingdom plantae. it is the oldest extant (living) vascular plant division at around 410 million years old. these species reproduce by shedding spores and have macroscopic alternation of generations, although some are homosporous while others are heterosporous. members of lycopodiophyta bear a protostele, and the sporophyte generation is dominant.eichhorn, evert, and raven (2005). biology of plants, seventh edition. 381-388. they differ from all other vascular plants in having microphylls, leaves that have only a single vascular trace (vein) rather than the much more complex megaphylls found in ferns and seed plants. ==classification== there are around 1,200 living (extant) species of lycopodiophyta which are generally divided into three orders (lycopodiales, isoetales, and selaginellales); in addition
Living_fossils Lycopodiophyta Plant_divisions