Flashcards in Sphenopsids and Ferns Deck (17)
When did ferns radiate?
During the Devonian and carboniferous in swamp forests
What are the most widespread seedless vascular plants?
What are Horestails?
Equestrium, very common and diverse in the carboniferous
How do horsetails reproduce?
Homosporous, give rise to bisexual gametophytes
What are anthophytes?
Stems have joints
How are horsetails structured?
Rings of small leaves emerge from each joint, but stems are main site of photosynthesis, large air canals carry oxygen to the roots
Why is it important to carry oxygen to the roots in Horsetails?
Because they live in waterlogged soil
What are the six different groups of ferns?
Moriattiales, Ophioglossales, Psilotales, Osmundales,Polypodials, Hydropteridales
What type of leaves do ferns have?
What are eusporangiate?
sporangia arise from a group of epidermal cells
What is leptosporangiate?
sporangia arise from a single epidermal cell
What are the leaves in ferns called?
How do fronds grow?
Unfurls at fiddle head
What is the reproductive strategy of the plant?
How are seeds dispersed in most species?
Stalk like sporangia that catapult spores several meters
What were ferns ancestors like?
Grew to massive heights, forming first forests in carboniferous