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Plant Division M6 Plant Biology Satit Patumwan Plant Kingdom • You will remember from M4 Genetics that the plant kingdom is not divided into phylum but into DIVISIONS. • Botanists (plant biologists) have classified 12 divisions of plants. The 12 divisions are separated into 2 groups: 1. Non-seed plants 2. Seed plants Seedless plants (Non-seed plants) Non-seed plants • There are 7 divisions of non-seed plants: 1. 2. 3. 4. 5. 6. 7. Hepatophyta Anthocerophyta Bryophyta Psilophyta Lycophyta Sphenophyta Pterophyta Hepatophyta • Small plants • Liverwort plants- Hepta means liver- these plants sometimes have leaves that looks like a liver. Wort- mean herb • Often confused with mosses. • Simple unicellular roots. • Nonvascular plants- grow in moist areas • Pioneer plants- first to go in new areas such as lava fields etc Liverworts Bryophyta • Like Hepatophytes they are seedless nonvascular small pioneer plants that usually grow in moist areas • The most common plant in this division is the MOSS • They have a simple filament as a root called a rhizoids which are a few cells in length and hold the plant in place Moss Anthocerophyta • Small plants • Like Hepatophytes and bryophyta they are non vascular seedless plants. • The sporophytes of these plants look like horns or antlers of an animal and therefore are commonly called Hornworts Hornwort Young Hornwort Old Hornwort Psilophyta • • • • • Seedless Vascular plant They have leafless stems They do not have any roots either Most live in tropical areas They are commonly called Whisk Ferns Whisk fern Lycophyta • Club Mosses • Vascular plants that have very small vascular leaves. • These plants are very ancient • The ancient plants which grew much taller have been transformed into coal which we use today. Club moss Sphenophyta • Horsetails • Vascular, seedless plants • They have hollow stems surrounded by needlelike leaves. • They are found near wet swamps Horsetail Horsetails look almost like small trees Pterophyta • • • • Non seed, vascular plants Grow in damp, shady places Commonly known as the ferns Usually have long leaves which can grow 5m in length, which are called fronds Fern- sporophyte generation Fern- Alternation of Generations Gametophyte stage of a fern Homework Please make a PowerPoint presentation on one of the divisions of the seed plants: 1. 2. 3. 4. 5. Cycadophyta Gnetophyta Ginkgophyta Coniferophyte Anthophyte (Please find the information on page 587-589 of your Biology textbook or in the library)
