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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
leaf surface
leaf tips
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To search the glossary, start typing, then select a word from the list.
Word
Definition
cortex
Outer layer or layers of cells of stem as opposed to central strand or cylinder.
corticolous
Growing on bark.
costa
Nerve; adj., costate.
crenate
With rounded teeth.
crenulate
With minute rounded teeth, usually formed from bulging cell walls
cribrose
Of peristome teeth, with numerous perforations
crispate
Curled or ruffled
crisped
Strongly curled and twisted
cucufiate
Of leaves, with margin at apex incurved to form hood-shaped tip, of calyptra, hood-shaped and split down one side
cuneate
Tapering to a sharp point. Similar to acute but with straight, not convex, sides.
cushion
Hemispherical plant formed by shoots radiating from a central point.
cuspidate
With a stout point, in leaves formed by thick excurrent nerve and in stem by imbricate, usually concave leaves
cygneous
Strongly curved in upper part like swan's neck.
cylinder
See central strand.
cylindrical
Cylinder-shaped
deciduous
Falling, being lost at maturity.
decumbent
Prostrate with ascending tips.
decurrent
Of leaf base, running down stem forming wings
dehisce
Open by loss of lid or opening of valves; adj., dehiscent.
deltoid
About the same length as width. Shaped like a triangle in which all sides are the same length.
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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