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Dryopteris aemula - Wikipedia

From Wikipedia, the free encyclopedia

Hay-scented buckler-fern

Dryopteris aemula in Galloway, Southern Scotland
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Division:	Polypodiophyta
Class:	Polypodiopsida
Order:	Polypodiales
Suborder:	Polypodiineae
Family:	Dryopteridaceae
Genus:	Dryopteris
Species:	D. aemula
Binomial name
*Dryopteris aemula* (Aiton) Kuntze

Dryopteris aemula, the hay-scented buckler-fern^[1] or hay-scented fern, is a species of perennial leptosporangiate fern.

Description

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Dryopteris aemula grows as a crown of fronds arising from a short ascending rhizome.

The rachis is dark purple-brown with red-brown lanceolate scales. Leaves are tri-pinnate, triangular-ovate or triangular-lanceolate, 15–60 cm (5.9–23.6 in) long, often arching, semi-evergreen and pale yellow-green. Scattered small sessile glands grow on the underside or both surfaces of the fronds. Pinnae are slightly concave giving the frond a characteristic crisped appearance. The plant is hay-scented.^[2]

Sori or spore-producing organs occur in a row down each side of the midrib. The indusium of the sorus is irregularly toothed and edged with sessile glands.

The plant does not reproduce vegetatively and relies upon spores to generate new individuals.^[3]

Taxonomy

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Distribution

Dryopteris aemula is confined to the atlantic coastal areas of western Europe and Macaronesia. D. aemula is highly oceanic in its distribution occurring mostly in the Köppen climate type Cfb (oceanic climates). Even within Great Britain, it is restricted to western districts and has just a few outlying eastern localities such as The Weald.

D. aemula reaches the northern limit of its distribution in Britain.

20% of the world population of D. aemula is in the United Kingdom.^[4]

Ecology and conservation

A fern of shady, often rocky, woodlands, usually on acidic soils.

In Britain, it is generally found in NVC woodland community W17.

References

^ BSBI List 2007 (xls). Botanical Society of Britain and Ireland. Archived from the original (xls) on 2015-06-26. Retrieved 2014-10-17.
^ Murthy, Hosakatte Niranjana (2023-06-20). Bioactive Compounds in Bryophytes and Pteridophytes. Springer Nature. ISBN 978-3-031-23243-5.
^ Micron. Pergamon Press. 1969.
^ Kent Biodiversity Action Plan Steering Group (1997). "Kent Biodiversity Action Plan" (PDF). Medway Council. Retrieved 21 November 2022.

External links

Clapham A. R., Tutin, T. G., Moore D. M. (1990). Flora of the British Isles. 3rd Ed. Cambridge University Press. Cambridge.
Page, C.N. (1997). The ferns of Britain and Ireland. 2nd Ed. Cambridge University Press. Cambridge.
Wardlaw, A.C and Leonard, A (2005) (editors). New Atlas of Ferns & Allied Plants of Britain & Ireland. British Pteridological Society Special Publications no.8.

Taxon identifiers
Dryopteris aemula	Wikidata: Q1872846 Wikispecies: Dryopteris aemula APDB: 130621 CoL: 37VT3 EPPO: DYOAE EUNIS: 150406 GBIF: 7319771 GRIN: 413438 iNaturalist: 359750 IPNI: 17092290-1 NBN: NBNSYS0000002070 NCBI: 239546 Observation.org: 117299 Open Tree of Life: 509227 PPE: dryopteris-aemula POWO: urn:lsid:ipni.org:names:17092290-1 Tropicos: 26610290 WFO: wfo-0001115752

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