Which preposition to use with lepidodendron

of Occurrences 1%

If one of these submarine forest beds should be gradually depressed and covered up by new deposits, it would present just the same characters as an under-clay of the coal, if the Sigillaria and Lepidodendron of the ancient world were substituted for the oak, or the beech, of our own times.

Which preposition to use with  lepidodendron