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Flashcards in Sphenopsids and Ferns Deck (17)
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1

When did ferns radiate?

During the Devonian and carboniferous in swamp forests

2

What are the most widespread seedless vascular plants?

Ferns

3

What are Horestails?

Equestrium, very common and diverse in the carboniferous

4

How do horsetails reproduce?

Homosporous, give rise to bisexual gametophytes

5

What are anthophytes?

Stems have joints

6

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

7

Why is it important to carry oxygen to the roots in Horsetails?

Because they live in waterlogged soil

8

What are the six different groups of ferns?

Moriattiales, Ophioglossales, Psilotales, Osmundales,Polypodials, Hydropteridales

9

What type of leaves do ferns have?

megaphyll

10

What are eusporangiate?

sporangia arise from a group of epidermal cells

11

What is leptosporangiate?

sporangia arise from a single epidermal cell

12

What are the leaves in ferns called?

fronds

13

How do fronds grow?

Unfurls at fiddle head

14

What is the reproductive strategy of the plant?

Homosporous

15

How are seeds dispersed in most species?

Stalk like sporangia that catapult spores several meters

16

What were ferns ancestors like?

Grew to massive heights, forming first forests in carboniferous

17

Where do most of our coal measures come from?

Carboniferoius