Fern fronds and sori

Fern fronds and sori

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Caption: Fertile fern fronds. Collection of various species of fern, upturned to reveal the sori. Left to right: polypody (Polypodium vulgare), male fern (Dryptoteris filix-mas), Hart's tongue (Asplenium scolopendrium) intermediate polypody (Polypodium interjectum) and polypody (Polypody vulgare). Sori are collections of sporangia, which are casings in in which the spores are produced.

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Keywords: asplenium scolpendrium, botanical, botany, dryptopteris filix-mas, fern, fertile, frond, fronds, hart's tongue, horticultural, horticulture, intermediate polypody, male fern, nature, polypodium interjectum, polypodium vulgare, polypody, sorus, sporangia, spores

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