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Cooksonia
Temporal range: Wenlock–Early Devonian
Cooksonia.png
A drawing of Cooksonia.
Scientific classification
Kingdom: Plantae
Division: Tracheophytes
Genus: †Cooksonia
  • C. paranensis
    (Gerrienne, 2001)
  • C. pertoni
    (Lang, 1937)
  • C. acuminata
    (Mussa, 2002)
  • C. bohemica
    ( Schweitzer, 1980)
  • C. cambrensis
    (Edwards, 1979)
  • C. downtonensis
    (?)
  • C. rusanovii
    (Ananiev, 1960)
Cooksonia was the earliest known land plant. It moved onto land during the middle Silurian period and went extinct during the early Devonian period.

Cooksonia was first discovered in Britain, where most of the fossils come from. It thrived around the world. No fossil has been found of a Cooksonia producing gemetes, but rather spores.

Description Edit

Cooksw

A fossil of Cooksonia from South Wales.

Cooksonia is one of the oldest plants to have a stem with vascular tissue. It was also a non-vascular bryophyte.

Cooksonias were small (about 0.03-3mm), and lacked leaves. Each branch had a sporangium at their end for producing spores.

Some Cooksonia species had trancheids (Although not many).

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