They were lowly shrubs of earth, here attaining gigantic size; lycopodiums, a hundred feet high; the huge sigillaria, found in our coal mines; tree ferns, as tall as our fir-trees in northern latitudes; lepidodendra, with cylindrical forked stems, terminated by long leaves, and bristling with rough hairs like those of the cactus.
Fácil era reconocerles, pues se trataba de los humildes arbustos de la tierra dotados de fenomenales dimensiones licopodios de cien pies de elevación, sigilarias gigantescas, helechos arborescentes, del tamaño de los abetos de las altas latitudes, lepidodendrones de tallo cilíndrico bifurcado, que terminaban en largas hojas y erizados de pelos rudos como las monstruosas plantas grasientas.