Psilotum complanatum, the flatfork fern, is a rare herbaceous epiphytic fern ally in the genus Psilotum. There is some evidence that it might be a true fern that has lost some typically fern-like characteristics.Morphologically, the plant is simple, lacking leaves and roots, and having hanging stems with dichotomous branching, which lack developed leaves but have minute scales. The stems and branches have protostele, with a triangular-shaped core of xylem. The scales are arranged in two rows along the flat stems and branches. The stems are broadly triangular in cross section and 5 mm wide. The branches are 1.5 to 2 mm wide. P. complanatum grows 10 to 75 cm long and stems branch in pairs a number of times up their length and are covered with brownish colored hair-like rhizoids. Small stalks
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| - Psilotum complanatum (es)
- Psilotum complanatum (nl)
- Psilotum complanatum (en)
- Psilotum complanatum (sv)
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| - El helecho espárrago (Psilotum complanatum) es una especie perteneciente a la familia Psilotaceae. El nombre del género (Psilotum) deriva del griego “psilos” (desnudo) haciendo referencia a la aparente desnudez de los tallos, mientras que la especie (P. complanatum) hace referencia a la forma de las “hojas” aplanadas o niveladas. (es)
- Psilotum complanatum is een zeldzame varen uit de familie Psilotaceae die voorkomt in tropische gebieden in verschillende werelddelen. Het is een zeer primitieve varen zonder echte wortels. Er zijn echter aanwijzingen dat de varen afstamt van voorouders met wortels, en dat die dus in de loop van de evolutie terug zijn verloren gegaan. (nl)
- Psilotum complanatum är en kärlväxtart som beskrevs av Olof Swartz. Psilotum complanatum ingår i släktet Psilotum och familjen Psilotaceae. Inga underarter finns listade i Catalogue of Life. (sv)
- Psilotum complanatum, the flatfork fern, is a rare herbaceous epiphytic fern ally in the genus Psilotum. There is some evidence that it might be a true fern that has lost some typically fern-like characteristics.Morphologically, the plant is simple, lacking leaves and roots, and having hanging stems with dichotomous branching, which lack developed leaves but have minute scales. The stems and branches have protostele, with a triangular-shaped core of xylem. The scales are arranged in two rows along the flat stems and branches. The stems are broadly triangular in cross section and 5 mm wide. The branches are 1.5 to 2 mm wide. P. complanatum grows 10 to 75 cm long and stems branch in pairs a number of times up their length and are covered with brownish colored hair-like rhizoids. Small stalks (en)
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| - El helecho espárrago (Psilotum complanatum) es una especie perteneciente a la familia Psilotaceae. El nombre del género (Psilotum) deriva del griego “psilos” (desnudo) haciendo referencia a la aparente desnudez de los tallos, mientras que la especie (P. complanatum) hace referencia a la forma de las “hojas” aplanadas o niveladas. (es)
- Psilotum complanatum, the flatfork fern, is a rare herbaceous epiphytic fern ally in the genus Psilotum. There is some evidence that it might be a true fern that has lost some typically fern-like characteristics.Morphologically, the plant is simple, lacking leaves and roots, and having hanging stems with dichotomous branching, which lack developed leaves but have minute scales. The stems and branches have protostele, with a triangular-shaped core of xylem. The scales are arranged in two rows along the flat stems and branches. The stems are broadly triangular in cross section and 5 mm wide. The branches are 1.5 to 2 mm wide. P. complanatum grows 10 to 75 cm long and stems branch in pairs a number of times up their length and are covered with brownish colored hair-like rhizoids. Small stalks end with simple sporangia from the axils of minute bifid, rounded sporophylls. Bean shaped, monolete spores are produced. The spores germinate best in a dark environment when ammonium is present. The gametophyte is non-photosynthetic, living in association with a fungus for its nutritional needs. Plants grow from a subterranean rhizome which anchors the plant in place and absorbsnutrients by means of filament like rhizoids. Some botanists believe P. complanatum is a survivor from a very primitive lineage of fern-like vascular plants. Psilotum complanatum lives in moist evergreen forests on the Malay Peninsula,Australia, Fiji islands, Mexico, Hawaii and South America. In India it is reported only from the Nicobar group of islands. Plants are typically found hanging from the trunks of trees or other epiphytic plant species. (en)
- Psilotum complanatum is een zeldzame varen uit de familie Psilotaceae die voorkomt in tropische gebieden in verschillende werelddelen. Het is een zeer primitieve varen zonder echte wortels. Er zijn echter aanwijzingen dat de varen afstamt van voorouders met wortels, en dat die dus in de loop van de evolutie terug zijn verloren gegaan. (nl)
- Psilotum complanatum är en kärlväxtart som beskrevs av Olof Swartz. Psilotum complanatum ingår i släktet Psilotum och familjen Psilotaceae. Inga underarter finns listade i Catalogue of Life. (sv)
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