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Spore-Bearing Vascular Plants
Psilophyta Genus: PsilotumCommon name: Whisk fernUnderground structure: Rhizome (no true roots)Description of the stem: Dichotomously branched,
PhotosyntheticStem appendage (leaf-like structure):
Enation (epidermal outgrowth) –no true leaves
Type of stele: ProtosteleReproductive structure: SynangiumType of spores: HomosporousDescription of gametophyte: Underground, exosporic
Psilophyta
LycophytaGenus: Lycopodium
Common name: Club mosses
Underground structure: True roots
Description of the stem: Dichotomously branched
Stem appendage (leaf-like structure):
Microphylls
Type of stele: Actinostele, plectostele
Reproductive structure: Strobilus
Type of spores: Homosporous
Description of gametophyte: Underground, exosporic
Lycophyta
strobilus
microphylls
sporangium
spores
sporophyll
LycophytaGenus: Selaginella
Common name: Spike ferns
Underground structure: True roots
Description of the stem: With rhizophores
Stem appendage (leaf-like structure):
Microphylls (heterophylly)
Type of stele: Polystele
Reproductive structure: Strobilus
Type of spores: Heterosporous
Description of gametophyte: Underground, endosporic
Lycophyta
rhizophores
microphylls
megasporophyll
megaspore
microsporophyll
microspore
microsporangium
megasporangium
LycophytaGenus: Isoetes
Common name: Quillworts
Underground structure: True roots
Description of the stem: Corm-like base (root stock)
Stem appendage (leaf-like structure):
Microphylls
Type of stele:
Reproductive structure: Sporophyll and soorangium at the basal part of outer leaves
Type of spores: Heterosporous
Description of gametophyte: Underground, endosporic
ArthrophytaGenus: Equisetum
Common name: Horsetail
Underground structure: True roots
Description of the stem: Jointed, ridged and silicified photosynthetic stems
Stem appendage (leaf-like structure):
Microphylls (reduced to scales)
Type of stele: Arthrostele
Reproductive structure: Strobilus
Type of spores: Homosporous
Description of gametophyte: Underground, exosporic
Arthrophyta
strobilus
