Diphasium C. Presi
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publication ID |
https://doi.org/10.5281/zenodo.302862 |
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persistent identifier |
https://treatment.plazi.org/id/1213417E-FFF7-FFF5-CDA9-FB634D97C0C9 |
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treatment provided by |
Plazi |
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scientific name |
Diphasium C. Presi |
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4. Diphasium C. Presi View in CoL 1
Stems long, creeping, dorsiventral; branches forked several times and usually caespitose. Leaves 4-ranked, opposite and decussate, somewhat scale-like, the lateral leaves carinate. Spikes terminal, sporophylls different from the leaves; sporangia opening at the apex; spores markedly muricate-reticulate. Prothallus holosaprophytic, napiform, with a semiglobose coronula at the apex.
1 Spikes pedunculate; stems usually subterranean
2 Finer branches 2-3 mm wide, distinctly flattened; lateral leaves wider than the dorsal 1. complanatum 2 Finer branches 1-2—1-5(—2) mm wide, slightly flattened; lateral leaves as wide as the dorsal. 2. tristachyum 1 Spikes subsessile; stems usually above ground
3 Finer branches cylindrical or slightly flattened; ventral leaves of sterile branches 0-5 mm wide, petiolate, lanceolate; sporophylls lanceolate, acute 4. alpinum 3 Finer branches 2-2-5 mm wide, flattened; ventral leaves of sterile branches sessile, linear; sporophylls ovate, acuminate 3. issleri
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