Exam 1 - pteridophytes

sporophyte (2n)

dominant generation in pteridophytes

whisk ferns

genus psilotum

psilotum
lycopods
equisetum
ferns

major groups of pteridophytes

club mosses, ground pines, spike mosses

lycopods include

horsetails and scouring rushes

Equisetem includes...

true ferns

polypodiopsida

psilotopsida (whisk ferns)

what group has dichotomous branching

psilotopsida (whisk ferns)

what group has only a true stem?

enations

psilotopsida leaf type

microphylls

lycopod and equisetem leaf type

megaphylls (fronds)

polypodiopsida (true fern) leaf type

homospory

spory of pteridophytes

synangium

cluster of 3 sporangia found in Psilotopsida (whisk ferns)

strobilus w/ sporophylls

unique reproductive structure of lycopods

strobilus w/ sporangiophores

unique reproductive structure of Equisetum

sporangiophores

contains clusters of sporangia

elaters

aid in the dispersal of spores

sorus (sori)

unique reproductive structure of polypodiopsida (true ferns)

sori

raised spots located on the underside of sporophyte ferns, clusters of sporangia

prostele

stele with solid core of vascular tissue

siphonostele

stele containing pith region (core of brown tissue) surrounded by vascular tissue

eustele

stele with isolated vascular bundles, occurs in more complex plants

protostele

stele of psilotopsida and lycopods

siphonostele

stele of equisetum and polypodiopsida