Everything about Archaefructus totally explained
Archaefructus is an
extinct genus of
herbaceous aquatic
seed plants with two known species.
Fossil material assigned to this genus originates from the
Yixian Formation in northeastern
China, originally dated as late
Jurassic but now thought to be approximately 125 million years old, or early
Cretaceous in age. Even with its revised age,
Archaefructus has been proposed to be one of the earliest known
genera of
flowering plants.
Because of its age, and because it lacks sepals and petals and its reproductive organs, interpreted as carpels and stamens, are produced on an elongate stem rather than condensed into a flower as in modern angiosperms,
Archaefructaceae has been proposed as a new basal
angiosperm family. An alternate interpretation of the same fossil, however, interprets the elongate stem as an inflorescence rather than a flower, with staminate (male) flowers below and pistillate (female) flower above. The discovery of
Archaefructus eoflora supports this interpretation, because a bisexual flower is present in the region between staminate and pistillate organs. If this interpretation is correct,
Archaefructus may not be basal within angiosperms, rather it may be close to the
Nymphaeales or the basal
eudicots.
Further Information
Get more info on 'Archaefructus'.
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