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Unformatted text preview: Focus Plant 10: Seedless Vascular Plants;
Bracken Fern (Pteridium aquilinum)
Bracken Possibly world's most
widespread plant species!
Europe, Asia, North America,
Australia, New Zealand &
Often forms large colonies—
may be dominant ground
Fibrous petioles & triangular,
tough, compound leaves.
Young leaves “fiddleheads”
eaten as vegetable in some
cultures (esp. Japan & korea)
Carcinogens: High rates of
stomach cancer among those
that regularly eat bracken.
that Bracken Fern in East Texas
Common on dry sandy uplands where it forms extensive colonies.
All remaining native ferns prefer moist or wet sites. The Fern Lifecycle (p 422).
Alternates between 2 generations:
Alternates Large, leafy sporophyte: Sporangium = spore-producing organ Sori = aggregations of sporangia on leaf. Small gametophyte = Prothallus:
Small Develops from the spore.
Develops Haploid, green, heart-shaped <1cm diameter.
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This document was uploaded on 03/28/2014 for the course BIO 131 at SFASU.
- Spring '14