familyLygodiaceae
genusLygodium
Show Lower Taxa
Difference between revisions of "Lygodium"
J. Bot. (Schrader) 1800(2): 7, 106. 1801.
Common names: Climbing ferns
Etymology: Greek lygodes, flexible, in reference to the twining rachis
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>terrestrial. <b>Stems</b> branched, slender. <b>Leaves</b> often more than several meters, 2-pinnate or more divided, climbing by means of twining rachis; fertile pinnae borne toward apex of fertile leaves. <b>Blades</b> of short, alternate primary pinnae. <b>Pinnules</b> ± entire to palmately or pinnately lobed; fertile and sterile pinnae similar or fertile pinnae greatly contracted.</span><!-- |
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Latest revision as of 20:24, 5 November 2020
Plants terrestrial. Stems branched, slender. Leaves often more than several meters, 2-pinnate or more divided, climbing by means of twining rachis; fertile pinnae borne toward apex of fertile leaves. Blades of short, alternate primary pinnae. Pinnules ± entire to palmately or pinnately lobed; fertile and sterile pinnae similar or fertile pinnae greatly contracted.
Distribution
Nearly worldwide, mostly tropical regions, a few species in temperate regions, North America, Asia in Japan, s Africa, Pacific Islands in New Zealand.
Discussion
Species ca. 40 (3 in the flora).
Selected References
Lower Taxa
Key
| 1 | Pinnules palmately lobed, sterile tissue nearly absent on fertile lobes; petioles borne 1–4 cm apart. | Lygodium palmatum |
| 1 | Pinnules 1-pinnate to palmately lobed, sterile tissue present on fertile lobes; petioles borne less than 1 cm apart. | > 2 |
| 2 | Pinnules usually 1-pinnate, primary divisions mostly undivided, usually without basal lobes; lobes absent or rounded, auriculate, not directed toward leaf apex; ultimate segments articulate to petiolules, leaving wiry stalks when detached; blade tissue glabrous abaxially. | Lygodium microphyllum |
| 2 | Pinnules usually more than 1-pinnate, primary divisions pinnately to palmately lobed or divided, or if undivided with distinct basal lobes; lobes directed toward leaf apex; ultimate segments not articulate to petiolules, not leaving wiry stalks when detached; blade tissue sparsely to moderately pubescent abaxially. | Lygodium japonicum |