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in The Biology Files
A plant pundit comments on plants, the foibles and fun of academic life, and other things of interest.
Showing posts with label ancestral flower. Show all posts
Showing posts with label ancestral flower. Show all posts
Friday Fabulous Flower - really ancient?
One of TPP's bright young colleagues, Herve Sauquet, has used a combination of morphology and molecular data to construct or model the first or ancestral flower. It has several whorls of 3 floral organs and to TPP's eyes, the model so derived looks a lot like a Magnolia virginiana. Many people have long thought that earliest flowers would have many spirally arranged parts. Actually there are several differences, so the similarity to a Magnolia is just superficial, mostly just the several perianth whorls. The oldest fossil flowers just don't look like this and molecular data suggests that flowering plants are older (149-256 my) than the fossil record indicates and so far no one has a really convincing pre-Cretaceous flowering plant fossil. Several pteridosperms in the fossil record have angiospermy features, but no certain flowering plant ancestor can be identified.
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