Gymnocarpium robertianum

Common name

Limestone Oak Fern

Gymnocarpium robertianum Limestone Oak Fern

Limestone Oak Fern

© Copyright
Natural History Museum

Latin names

Class	Pteridopsida
Order	Polypodiales
Family	Aspidiaceae
Genus	Gymnocarpium
Species	robertianum

Geographic details

Habitat	wet rocks and walls
Soil type	alkaline
Distribution	SW W England Ireland Wales
Native	Yes

General

Plant height	medium
Branched	No
Plant colour	grey-green
Habit	lvs single
Conservation status	not threatened

Leaf details

Separate fertile leaves	No
Leaf shape	triangular
Pinnae	2-pinnate-pinnatisect
Wintergreen	No

Spore details

homospore

Yes

Rhizome details

Rhizome description	slender branching
Rhizome scales	colourless
Rhizome position	creeping

Sori details

Sori shape	round
Sori placement	on lateral veins closer to midrib

Indusium details

indusium present

No