sporangia psilotum nudum aerial stems arising from horizontal rhizomes |
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| navigate by keyword : sporangium plant detail whisk flying proud pavilion matsubaran rhyniophytes fern closeup nature rhizomes psilotum nudum needlelike botany sporophyte growth glowing sporophyll fresh ferns homosporous singlelayered sporophytes sporangia aerial stems arising horizontal |
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| Sporangia on the Psilotum nudum on aerial stems arising from horizontal rhizomes |
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