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The Ferns Identifier for the British Isles
Learn about ferns, Identify your fern specimen.
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general
leaf arrangement
leaf bases
leaf lobes
leaf margins
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leaf tips
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To search the glossary, start typing, then select a word from the list.
Word
Definition
archegonium
Flask-shaped structure containing the female gamete, consisting of a swollen basal part or venter surrounding the egg cell, and tubular upper part or neck.
arcuate
Of capsule,curved like a bow
areolation
The form and arrangement of the cells (of a leaf).
arista
A fine bristle-like point; adj.,aristate
articulate
Jointed, usually with reference to the transverse lines on peristome teeth
ascending
Growing upwards, often from an older procumbent part.
attenuate
Gradually tapering to a slender point
auricle
Enlarged or differentiated cells at basal angles of leaf forming lobe or distinctive group of cells; adj.,auriculate
auriculate
A base with rounded projections that have a concave inner margin.
autoecious
Having antheridia and archegonia born in separate inflorescences on the same plant
axil
Angle between leaf base and stem; adj.,axillary.
beak
Projection from lid of capsule.
bidentate
With teeth in pairs
bifid
Divided into two segments or parts.
bifid T-shaped hairs
With hairs divided into two segments
biflagellate
With two flagella.
bipinnate
Twice pinnately branched.
biserrate
With serrate teeth along the margins of other, larger serrate teeth.
bistratose
Two cells thick.
bulbiform
Bulb-like; with imbricate radical leaves forming bulb-like plant.
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Ferns
Adiantaceae
Adiantum
Anogramma
Cryptogramma
Aspidiaceae
Dryopteris
affinis
Gymnocarpium
Polystichum
Aspleniaceae
Asplenium
obovatum
trichomanes
Athyriaceae
Athyrium
distentifolium
Cystopteris
Woodsia
Azollaceae
Azolla
Blechnaceae
Blechnum
Dennstaedtiaceae
Pteridium
aquilinium
Hymenophyllaceae
Hymenophyllum
Trichomanes
Marsileaceae
Pilularia
Ophioglossaceae
Botrychium
Ophioglossum
Osmundaceae
Osmunda
Polypodiaceae
Polypodium
Pteridaceae
Pteris
Thelypteridaceae
Oreopteris
Phegopteris
Thelypteris