#structural fronds
- Adiantopsis radiata — A species of tropical fern in the family Pteridaceae, genus Adiantopsis, structurally characterized by spectacular palmate fronds whose long, narrow pinnae are arranged radially, resembling the spokes of a wheel or the rays of a circle. This plant is native to the moist forests of Central and South America, being cultivated internationally in greenhouses and private botanical collections due to its unique aesthetic value.
- Adiantum cuneatum — A species of ornamental fern in the family Pteridaceae, also known by the synonymous taxonomic name Adiantum raddianum; it is structurally characterized by delicate, triangular fronds with small, wedge-shaped (cuneate) pinnae suspended on thin, black, shiny petioles. This plant, native to tropical regions of South America, is frequently cultivated globally as a houseplant due to its extremely decorative and airy foliage.
- Adiantum reniforme — A rare and spectacular species of fern in the family Pteridaceae, genus Adiantum, remarkable for its unusual structure, having simple, entire, and rigid kidney-shaped (reniform) or heart-shaped fronds supported by long, thin, brownish-black petioles. This plant is native to the islands of Macaronesia (Madeira, Canaries) and certain regions of Africa, preferring shaded rocky crevices in volcanic zones, and is protected within its natural habitats.