genus Rhynia

Từ điển WordNet v3.1 - WordNet Dictionary

noun

type genus of the Rhyniaceae;
small leafless dichotomously branching fossil plants with terminal sporangia and smooth branching rhizomes
• Syn:
Rhynia
• Hypernyms:
fern genus
• Member Holonyms:
Rhyniaceae, family Rhyniaceae