EBIO 1210 Lecture Notes - Lecture 26: Lycopodiopsida, Rhyniopsida, History Of Plant Systematics

• School: CU-Boulder
• Department: Ecology & Evolutionary Biology
• Course: EBIO 1210
• Professor: Randolf Didomenico

Document Summary

Plant systematics and phylogeny: non-vascular plants nontracheophytes, common features: cuticle; stomata; gametangia; flagellated sperm; gametophyte dominates, division bryophyta: the mosses; dominant in the arctic and. ; peat moss: p. hepatophyta: liverworts; gemmae-asexual repro. Structures: p. anthocerophyta: hornworts; most closely related to vascular plants, seedless vascular plants or tracheophytes, additional features: vascular tissues: xylem and phloem; lignin; roots, stems and leaves; sporophyte branched and dominant; flagellated sperm, rhyniaceae: cooksonia sp. ; this is an extinct phylum; first known vascular land plant approx. 420 mya. homosporous: p. lycophyta: club mosses and ground pines; homosporous and heterosporous types; microphylls (small leaves). Carboniferous (coal deposits); now only herbaceous forms; tropical epiphytes: p. pterophyta: ferns; most diverse and abundant of the seedless vascular plants; megaphylls-fronds; sori; primarily homosporous, psilotum sp. : whisk ferns; simplest of vascular plants-no leaves or roots, just stems. (stems were the first thing to evolve: equisetum sp.