familyParkeriaceae
genusCeratopteris
Show Lower Taxa
Difference between revisions of "Ceratopteris"
Bull. Sci. Soc. Philom. Paris sér. 3, 8: 186. 1821.
Common names: Antler ferns water ferns floating ferns
Etymology: Greek cerato, horned, and pteris, fern, referring to the antlerlike fertile leaf
Basionym: Parkeria Hooker Exot. Fl. 2: plate 147. 1825
Treatment appears in FNA Volume 2.
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| − | --><span class="statement" id="st- | + | --><span class="statement" id="st-undefined" data-properties=""><b>Plants </b>2–120 cm. <b>Stems</b> 1–10 mm diam., sparsely scaly. <b>Leaves</b> erect. <b>Proximal</b> leaves broad, simple and lobed to 4-pinnate, glabrous; distal leaves finely dissected with linear ultimate segments. <b>Sporangia</b> nearly sessile, usually densely packed, globose. <b>Spores</b> tetrahedral.</span><!-- |
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Latest revision as of 20:24, 5 November 2020
Plants 2–120 cm. Stems 1–10 mm diam., sparsely scaly. Leaves erect. Proximal leaves broad, simple and lobed to 4-pinnate, glabrous; distal leaves finely dissected with linear ultimate segments. Sporangia nearly sessile, usually densely packed, globose. Spores tetrahedral.
Distribution
Tropical, subtropical, and warm temperate regions worldwide.
Discussion
Species 3–4 (3 in the flora).
Selected References
Key
| 1 | Sterile leaves simple, palmately or pinnately lobed, sometimes 2–4-pinnate, deltate to cordate to ovate; proximal pinnae or veins of lobes usually opposite; petioles frequently inflated. Fertile leaves usually deltate to cordate to reniform; sporangia lacking annulus or annulus well developed, indurate cells 0–10(–40). | Ceratopteris pteridoides |
| 1 | Sterile leaves (1–)2–3-pinnate, lanceolate, lance-ovate, ovate to deltate; proximal pinnae usually alternate; petioles usually not inflated. Fertile leaves lanceolate, sometimes ovate, deltate, or cordate; sporangia with well-developed annulus, indurate cells 13–71. | > 2 |
| 2 | Sporangia with 32 spores. | Ceratopteris thalictroides |
| 2 | Sporangia with 16 spores. | Ceratopteris richardii |