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plant id > Pteropsida > Flashcards

Pteropsida Flashcards

1
Q

What is the common name for Pteropsida?

A

Ferns

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2
Q

What groups are the Pteropsida divided into?

A

Eusporangium

Leptosporangium

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3
Q

What groups are within the Eusporangia?

A

Moonworts
Whisk ferns
Horsetails
Marattiales

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4
Q

What Leptosporangiate ferns are native to the UK?

A

Osmundaceae
Hymenophyllaceae
Polypodiales

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5
Q

What features define the Horsetails (Equisetaceae)?

A 
Jointed stems
Whorled branches
Leaves highly reduced
Sporangia in rings around central axis to make cone
Spores have elaters for dispersal
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6
Q

Describe the feautures of Leptosporangiate ferns.

A

Frond is aerial part of fern, divided into blade and stipe
Lower part of fern is rhizome
Cicinate venation - coiled into crosiers
Sorus - aggregation of sporangia, usually on underside of frond, indusium - flap like covering

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7
Q

Describe the Sporangium of Leptosporangiate ferns.

A

Sporangium wall 1 cell thick
Composed of annulus and stalk
Dispersal acts like spring - drying causes spine to reflex, further drying causes snap back into position

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8
Q

What is the common name for Osmundaceae?

A

Royal ferns

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9
Q

Describe the Osmundaceae.

A

Fronds heteromorphic

2 pinnate

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10
Q

What is the common name of the Hymenophyllaceae?

A

Filmy ferns

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11
Q

Describe the Hymenophyllaceae.

A

Fronds translucent

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12
Q

What are the UK native families of Polypodiales?

A

Dennstaedtiaceae - Pteridium (sori submarginal, linear, frond margin recurved)
Pteridaceae - Cryptogramma, Anogramma, Adiantum
Aspleniineae: frond with 2 vascular bundles
Cystopteridaceae
Aspleniaceae - sori linear
Woodsiaceae
Blechnaceae - Fronds heteromorphic
Athyriaceae - sori J shaped
Thelypteridaceae
Polypodiineae: frond with vascular bundles in U shaped arch
Dryopteridaceae - stems scaly, indusium present
Polypodiaceae - sori circular/oblong, no indusium

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13
Q

Describe the Dennstaedtiaceae (bracken).

A

Frond 3 pinnate
Sori submarginal
No indusium
Margin recurved

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14
Q

Describe the Blechnaceae (hard fern).

A

Fronds heteromorphic

1 pinnate/ pinnatifid

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15
Q

Describe the Dryopteridaceae.

A

Fronds 1-3 pinnate
Scaly at least at base
Sori near midvein, shield or kidney shaped
Indusium present

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16
Q

Describe the Polypodiaceae.

A

1 pinnate/pinnatifid
Sori near midvein, (sub)circular
No indusium

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