Nederlandse BookmakersSeri�se Neue CasinosUK Betting SitesNuovi Casino 2025

Hardy Fern Home

Pteridium resources
Flora
Flora of North AmericaFlora of North America
Flora of TaiwanFlora of Taiwan
Taxonomy
also distributionalso distribution

All Ferns
Dennstaedtiaceae
�� Pteridium
���� aquilinum

�Other Genera
��� Adiantum Arachniodes
��� Aspidotis Asplenium
��� Astrolepis Athyrium
��� Blechnum Cheilanthes
��� Cryptogramma Cyrtomium
��� Cystopteris Dennstaedtia
��� Deparia Diplazium
��� Dryopteris Gymnocarpium
��� Lygodium Matteuccia
��� Onoclea Oreopteris
��� Osmunda Pellaea
��� Phegopteris Pleopeltis
��� Polypodium Polystichum
��� Pteris Pyrrosia
��� Thelypteris Woodsia
��� Woodwardia
Pteridium Gleditsch ex Scopoli (Dennstaedtiaceae) Earlier placement: Hypolepidaceae, Polypodiaceae

Bracken

Etymology Greek: pteron, a wing, from the shape of the pinnae, but the ancient Greeks used pteris for ferns in general. The word progresses to pteridion, a small fern.
Description Rhizome: long-creeping, jointed hairs.
Frond: deciduous, monomorphic.
Stipe: pale green, glabrous above with soft hairs at the brown base, vascular bundles: numerous, U- or O-shaped in cross section.
Blade: 2-4 pinnate, broadly deltate, large, papery to leathery.
Pinnae: lowest very large, costae rachis and costae grooved above, veins free, forked, except for a marginal strand.
Sori: continuous, along the margin, indusium: double, the outer false, reflexed, the inner distinct or absent.

Pteridium aquilinum. Hairs, venation, false indusium. �BioImages: The Virtual Field-Guide (UK), photo � Malcolm Storey.
Valid XHTML 1.0���� Reports of errors and omissions appreciated: toms AT hardyfernlibrary.com (please replace the AT with @)