Difference between revisions of "Cyrtomium"
Tent. Pterid. 86. 1836.
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|distribution=North America;Asia;Africa including Madagascar;Pacific Islands (Hawaii). | |distribution=North America;Asia;Africa including Madagascar;Pacific Islands (Hawaii). | ||
| − | |discussion=<p>This difficult genus requires further systematic study. Estimates of species numbers have ranged from 9 (C. Christensen 1930) to 59 (Shing K. H. 1965). The group might better be considered a subgenus of Polystichum, from which it is poorly differentiated morphologically.</p><!-- | + | |discussion=<p>This difficult genus requires further systematic study. Estimates of species numbers have ranged from 9 (C. Christensen 1930) to 59 (Shing K. H. 1965). The group might better be considered a subgenus of <i>Polystichum</i>, from which it is poorly differentiated morphologically.</p><!-- |
--><p>Species ca. 15 (2 in the flora).</p> | --><p>Species ca. 15 (2 in the flora).</p> | ||
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|publication year=1836 | |publication year=1836 | ||
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| − | |source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/ | + | |source xml=https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/8f726806613d60c220dc4493de13607dd3150896/coarse_grained_fna_xml/V2/V2_578.xml |
|genus=Cyrtomium | |genus=Cyrtomium | ||
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-->[[Category:Treatment]][[Category:Dryopteridaceae]] | -->[[Category:Treatment]][[Category:Dryopteridaceae]] | ||
Revision as of 15:49, 18 September 2019
Plants terrestrial or on rock. Stems erect or ascending, stolons absent. Leaves monomorphic, evergreen. Petiole ± 1/2–3/4 length of blade, base not swollen; vascular bundles more than 3, arranged in arc, ± round in cross section. Blade oblong-lanceolate, 1-pinnate with pinnae not lobed, distal pinnae only slightly smaller, blade ending in basally lobed pinna ± similar to lateral pinnae, papery or somewhat leathery. Pinnae not articulate to rachis, segment margins crenate to spinulose, sometimes also coarsely dentate; proximal pinnae not reduced, petiolulate, equilateral or somewhat inequilateral with acroscopic base more developed; costae adaxially grooved, grooves continuous from rachis to costae; indument of filiform scales abaxially, absent adaxially. Veins elaborately anastomosing, areoles formed with 1–3 included veinlets. Sori in 2 or more rows between midrib and margin, round. Indusia peltate, persistent or caducous. Spores brown, with inflated folds or wings. x = 41.
Distribution
North America, Asia, Africa including Madagascar, Pacific Islands (Hawaii).
Discussion
This difficult genus requires further systematic study. Estimates of species numbers have ranged from 9 (C. Christensen 1930) to 59 (Shing K. H. 1965). The group might better be considered a subgenus of Polystichum, from which it is poorly differentiated morphologically.
Species ca. 15 (2 in the flora).
Selected References
Lower Taxa
Key
| 1 | Pinnae 4-10(-12) pairs, leathery, shiny adaxially, margins sometimes undulate or coarsely dentate, but not minutely crenulate or denticulate. | Cyrtomium falcatum |
| 1 | Pinnae (8-)10-25 pairs, papery, not shiny adaxially, margins minutely crenulate-denticulate. | Cyrtomium fortunei var. fortunei |