Spellingbee word. psilophyton
Noun 1. genus Psilophyton - type genus of the Psilophytaceae: genus of small wiry herbaceous Paleozoic plants with underground rhizomes and apical sporangia
fern genus - genera of ferns and fern allies
family Psilophytaceae, Psilophytaceae - Paleozoic plants
psilophyton - any plant or fossil of the genus Psilophyton