familyBlechnaceae
genusWoodwardia
Show Lower Taxa
Difference between revisions of "Woodwardia"
5: 411. 1793 Chain fern [in honor of Thomas Jenkin. 1745.
Common names: Chain fern
Etymology: in honor of Thomas Jenkin 1820, English botanist
Synonyms: Anchistea C. PreslLorinseria C. Presl
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 or rarely on rock. <b>Stems</b> long-creeping to erect, slender to stout, not climbing; scales brown. <b>Leaves</b> monomorphic (dimorphic in 1 species), clustered or well separated. <b>Blades</b> pinnate or pinnatifid. <b>Rachises</b> and costae scaly. <b>Veins</b> anastomosing in both sterile and fertile leaves, forming a regular series of areoles along costae and costules, further anastomosing in 1 species. <b>Sori</b> discrete, in chainlike rows along costae or costules, extending only the length of individual areolar veins. <b>Spores</b> with perine irregularly folded. <b>x</b> = 34, 35.</span><!-- |
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Revision as of 13:21, 27 July 2019
Plants terrestrial or rarely on rock. Stems long-creeping to erect, slender to stout, not climbing; scales brown. Leaves monomorphic (dimorphic in 1 species), clustered or well separated. Blades pinnate or pinnatifid. Rachises and costae scaly. Veins anastomosing in both sterile and fertile leaves, forming a regular series of areoles along costae and costules, further anastomosing in 1 species. Sori discrete, in chainlike rows along costae or costules, extending only the length of individual areolar veins. Spores with perine irregularly folded. x = 34, 35.
Distribution
North America, Central America, Mediterranean Europe, e Asia.
Discussion
Woodwardia radicans (Linnaeus) Smith has been reported as an escape from cultivation in Florida and in the Sierra Nevada in California; it has not persisted. It and the commonly cultivated Woodwardia unigemmata Makino resemble Woodwardia fimbriata Smith, but both W. radicans and W. unigemmata are distinguished by having a scaly bulblet near the apex of the leaf.
Species 14 (3 in the flora).
Selected References
None.
Lower Taxa
Key
| 1 | Leaves strongly dimorphic; sterile blades ± pinnatifid, with 2 or more rows of areoles between costae and margin, veins free only at margin. | Woodwardia areolata |
| 1 | Leaves ± monomorphic; sterile blades pinnate, with 1 row of areoles adjacent to costae or costules, veins free to margin. | > 2 |
| 2 | Stems forming stout caudex covered with petiole bases, suberect; petioles straw-colored and densely covered with orangish scales at base; pinnae not articulate to rachis. | Woodwardia fimbriata |
| 2 | Stems relatively slender to ca. 1 cm diam., long- creeping; petioles blackish and glabrate at base; pinnae articulate to rachis. | Woodwardia virginica |