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pteridophyte (any plant of division Pteridophyta inc ferns and fern allies)
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Hawaii
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Hawaii
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Fern frond or leaf tightly coiled to protect the growing tip and subdivisions of the frond As the lower parts of a frond expand and toughen up the
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Fern frond or leaf tightly coiled to protect the growing tip and subdivisions of the frond As the lower parts of a frond expand and toughen up the
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pteridophyte (any plant of division Pteridophyta inc ferns and fern allies)
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Pteridophyta
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Fern frond morphology
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Boy studying a fern frond with a magnifying glass
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Stomata of scouring rush (Equisetum sp) SEM
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Water shamrock (Marsilea quadrifolia)
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Wholeleaf cloakfern (Astrolepis integerrima) Texas USA
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Common horsetail (Equisetum arvense)
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Wood Horsetail (Equisetum sylvaticum) with fertile fronds Photographed in Canada
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Water horsetail (Equisetum fluviatile) fertile fronds with spores Photographed in Canada
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Water horsetail (Equisetum fluviatile)
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Western maidenhair fern (Adiantum aleuticum)
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Royal fern (Osmunda regalis)
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Stomata of scouring rush (Equisetum sp) SEM
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Stomata of scouring rush (Equisetum sp) SEM
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Bright field light micrograph of the underside of a maidenhair spleenwort (Asplenium trichomanes) leaf The grey areas contain sori clusters of spore
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Male fern (Dryopteris filix-mas) frond
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Birds nest fern (Asplenium nidus)
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King fern (Ptisana salicina) frond Photographed in Madagascar
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King fern (Ptisana salicina) Photographed in Madagascar
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Fossilised seed fern seeds
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Fossil fern trunk
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Fossil fern fronds
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Fossil Todites denticulatus fern fronds Jurassic fossil leaf from York UK Specimen held at the Natural History Museum London UK
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Fossil fern frond
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Fossil conifer
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Gymnosperm fossil
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Gymnosperm fossil
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Giant horsetail leaf fossils
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Fossil Calamites (Annularia radiata) leaves This plants leaves were borne in whorls approximately 15 millimetres in size This fossil was discovered
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Fossil Sphenophyllum plant This specimen was discovered in Wales and dates back to the Late Carboniferous period 300 to 359 million years ago Natur
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Petrified tree fern Polished section of a fossil of the trunk of the tree fern Tubicaulis africanus This was a common plant of the Palaeophytic the
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Petrified fern Polished section of a fossil of the trunk of the fern Palaeosmunda williamsonii This specimen is approximately 4 centimetres across
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Dicroidium seed fern fossil This specimen from Queensland Australia dates from the Triassic It is part of the collections held at the Natural Hi
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Petrified tree fern Polished section of a fossil of the trunk of the tree fern Psaronius This specimen is approximately 15 centimetres across It is
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Thursophyton elberfeldense plant fossils This fine-grained shale block contains fossils of massed stick-like stems of early land plants It is appro
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Nilssonia kendalli cycad frond fossils This specimen is part of the collections held at the Natural History Museum London UK
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Glossopteris fern fossil
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Neuropteris seed fern fossil This plant fossil dates from the Carboniferous This specimen is part of the collections held at the Natural History Mu
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Fern frond (Polystichum sp) unfurling
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Fossil horsetail (Annularia sphenophylloid)
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Hard fern (Blechnum spicant) fronds These are four young fertile fronds three unfurling and one freshly unfurled
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Horsetail spores SEM
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Horsetail spores SEM
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Harts tongue fern (Phyllitis scolopendrium) Underside of harts tongue fern frond showing spore cases (brown) Photographed in September in Dorset
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Northern maidenhair fern (Adiantum pedatum) growing next to moss-covered rocks in a temperate rainforest This fern is native to North America These
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Plant evolution diagram
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Plant evolution diagram
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Plant evolution diagram
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Plant evolution diagram
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Horsetail spore SEM
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Horsetail spores SEM
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Horsetail spore SEM
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Horsetail spores Coloured scanning electron micrograph (SEM) of spores of a horsetail (Equisetum arvense) plant The spores (round) bear elaters (hel
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Common horsetail stem Light micrograph of a cross-section through the tip of the condensed stem of the common horsetail (Equisetum arvense) showing
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Common horsetail stem light micrograph
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Cross-section of a rhizome Light micrograph of a cross-section through a rhizome of the bracken (Pterdium aquilinum) showing ground tissue in which t
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Bracken rhizome light micrograph
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Fern fronds or leaves are tightly coiled when young to protect the growing tip and subdivisions of the frond As the lower parts of a frond expand
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Fern spore cases Polarised light micrograph of a frond of the maidenhair fern (Adiantum capillus- veneris) showing the sporangia (black centre left
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Lady fern fronds (Athyrium filix-femina)
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Carboniferous period horsetail tree
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Tempskya tree-like ferns from the Cretaceous period
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Asterophyllites plant from the Carboniferous period
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Pteridophyta poloniae Exsiccata fern specimen This fern specimen was collected from the west Carpathian Mountains
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Pteridophyta poloniae Exsiccata fern specimen This fern specimen was collected from the west Carpathian Mountains
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Asterophyllites prehistoric tree
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Tempskya prehistoric tree-like fern
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Tempskya tree on white background
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pteridophyte (any plant of division Pteridophyta inc ferns and fern allies)
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Hawaii
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Hawaii
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