Ophioglossum vulgatum
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Ophioglossum vulgatum, commonly known as adder's-tongue, southern adder's-tongue or adder's-tongue fern, is a species of fern in the family Ophioglossaceae.
Ophioglossum vulgatum Saarland 01
Growing in sand-dunes on Anglesey
Frond
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A frond is a large, divided leaf. In both common usage and botanical nomenclature, the leaves of ferns are referred to as fronds and some botanists restrict the term to this group. Other botanists all
Ophioglossum vulgatum
…a perennial species of vascular plant. The plant grows from a rhizome base to 10–20 cm (3.9–7.9 in) tall (rarely to 30 cm). It consists of a two-part frond, separated into a 4–12 cm (1.6–4.7 in) rounded diamond-shaped leaf sheath and narrow branchless spore-bearing spike. Leaf fronds are ovate in shape and…
A fern (Dryopteris decipiens) with simple (lobed or pinnatifid) blades, the dissection of each blade not quite reaching to the rachis.
A growing fern frond unfurling.
Unfurling fiddlehead fern frond
Adaxial (left) and abaxial (right) surfaces of a pinnate fern frond (Blechnum appendiculatum). Sori are evident on the abaxial surface.