Botany Lab Prep

SEEDLESS VASCULAR PLANTS

BIO 201 - BOTANY

Taxonomy

• Division Lycophyta – club mossesLycopodium and Selaginella* microphylls* one sporangium per sporophyll

• Division Sphenophyta – horsetails* microphylls (not photosynthetic)* sporangia clustered into strobili

• Division Polypodiophyta – fernsaka Pteridophyta* megaphylls* many sporangia per sporophyll

Lycophyta - Lycopodium

• True vascular tissue (root, stem, leaf)

• Leaves as microphylls

Lycopodium

• All microphylls alike

• Spores on microphylls or strobili

Lycophyta - Selaginella

• Anisphyllous microphylls

• Stobili present

Lycophyta – slide materail

• Rhizome x.s.

• Lycopodium strobilus l.s.

• Sporophyll(whole thing)

• Sporangium(rounded object)

• Spores(small, red)

Sphenophyta - horsetails

•

Polypodiophyta - ferns

• Fern fronds

• Fiddlehead

• Fern frond with sprangia

Sorus types:• Naked• Marginal• Umbrella