Meaning of zygopterid | Babel Free

Definitions

A member of the Zygopterideae, an extinct family of ferns within order Osmundales having three-dimensional fronds with pinnae in four ranks and a rachis that is radially symmetrical in cross section.

Examples

“As in the zygopterids, the fronds of the coenopterids were […]”

“Phillips and Galtier (2005) also suggested that the ancestral form of the zygopterids was arborescent, based on the fact that the earliest forms (clepsydroid types) are arborescent.”

CEFR level