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Cystodium; It’s Not a Tree Fern: It’s a Polypod!

Cystodium; It’s Not a Tree Fern: It’s a Polypod!. Jessica Zamiara PBIO 209. Once Upon a Time…. 1841 Cystodium Sorbifolium (J.Smith) Lowland (1300 ft) Malaysian Rainforests. Cystodium Sorbifolium. Non Arborescent Tree Fern Why Dicksonia?. Two Papers Published

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Cystodium; It’s Not a Tree Fern: It’s a Polypod!

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  1. Cystodium; It’s Not a Tree Fern: It’s a Polypod! Jessica Zamiara PBIO 209

  2. Once Upon a Time…. • 1841 Cystodium Sorbifolium (J.Smith) • Lowland (1300 ft) Malaysian Rainforests

  3. Cystodium Sorbifolium • Non Arborescent Tree Fern • Why Dicksonia?

  4. Two Papers Published The Gametophyte of Cystodium & New Cytological Records for Cystodium & Dicksonia Uniting factor lack of hairs on the Thallus of Dicksonia & Cystodium Gametophyte Cystodium 2n=112, n=56 1965

  5. 1966 • Anatomy of Cystodium, Sen & Mittra • First detailed account • Stark contradicts between Dicksonia & Cystodium • Differences do not rule out origin from a common ancestor

  6. 1981 • Spore Morphology in the Dicksoniaceae, Gastony • 32 typical number for spores per sporangia - not apogamous! • Completely different from other cyatheoid-dicksonioid species

  7. 1983 • B.S. Parris • Conserve Cystodium against Cystodium Fee

  8. The Stipe & Rachis Vasculature of the Dicksonioid Fern, Cytodium Sorbifolium. Croft Sen & Mittra had stipe wrong Genera Cystodium & Dicksonia have little in common other than hairy stipe & indusium structure Proposed through anatomical, spore, chromosome evidence for Cystodiaceae 1986

  9. On the Phylogenetic position of Cystodium, Korall et al. DNA sequence data from rbcL and atpB Cystodium is resolved into the polypod clade with high support Tentatively inclusion in Lindsaeceae, certainly not a member of Dicksoniaceae 2006

  10. Lived happily ever after….

  11. Bibliography

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