Dryopteris expansa

Common name

Northern Buckler Fern

Dryopteris expansa Northern Buckler Fern

Northern Buckler Fern

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Natural History Museum

Latin names

Class	Pteridopsida
Order	Polypodiales
Family	Aspidiaceae
Genus	Dryopteris
Species	expansa
Alternative Family name	Dryopteridaceae
Alternative Species name	assimilis

Geographic details

Habitat	damp upland woods and scree
Soil type	tolerant
Distribution	scattered in uplands
Native	Yes

General

Plant height	large
Branched	No
Plant colour	mid-green
Stipe description	scaly
Habit	lvs shuttlecock
Conservation status	Rare

Leaf details

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

Spore details

homospore

Yes

Rhizome details

Rhizome description	short
Rhizome scales	ovate-deltate, acuminate apex
Rhizome position	erect

Sori details

Sori shape	kidney
Sori placement	singly along lateral veins

Indusium details

indusium present	Yes
indus_shape	kidney
indusium description	dentate