Crepidomanes intricatum
| Weft fern | |
|---|---|
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Scientific classification 
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| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Division: | Polypodiophyta |
| Class: | Polypodiopsida |
| Order: | Hymenophyllales |
| Family: | Hymenophyllaceae |
| Genus: | Crepidomanes |
| Species: | C. intricatum
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| Binomial name | |
| Crepidomanes intricatum | |
| Synonyms[1] | |
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Crepidomanes intricatum, synonym Trichomanes intricatum,[1] is known as the weft fern.[2] The genus Crepidomanes is accepted in the Pteridophyte Phylogeny Group classification of 2016 (PPG I),[3] but not by some other sources. As of October 2019[update], Plants of the World Online sank the genus into a broadly defined Trichomanes, treating this species as Trichomanes intricatum.[4]
This is an unusual filmy fern that grows in rock shelters and crevices in the eastern United States, with the southern extent in Georgia and extending north into New England.[5] It is known only from its filamentous gametophytes and completely lacks the sporophyte generation.[6] It is a rare plant that is protected in several US states.[6]
Recent study has found a relationship between this species and an Asian filmy-fern species, Crepidomanes schmidianum. Both share the same chloroplast genome, although the relationship between the two species is uncertain.[7] In 2011, Atsushi Ebihara and Alan S. Weakley transferred Trichomanes intricatum to Crepidomanes intricatum based on the chloroplast molecular sequence data.[8]
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Closeup
References[edit]
- ^ a b c Hassler, Michael & Schmitt, Bernd (August 2019). "Crepidomanes intricatum". Checklist of Ferns and Lycophytes of the World. 8.10. Archived from the original on 2017-09-02. Retrieved 2019-10-08.
- ^ USDA, NRCS (n.d.). "Trichomanes intricatum". The PLANTS Database (plants.usda.gov). Greensboro, North Carolina: National Plant Data Team. Retrieved 14 December 2015.
- ^ PPG I (2016). "A community-derived classification for extant lycophytes and ferns". Journal of Systematics and Evolution. 54 (6): 563–603. doi:10.1111/jse.12229. S2CID 39980610.
- ^ "Trichomanes intricatum Farrar". Plants of the World Online. Royal Botanic Gardens, Kew. Retrieved 2019-10-08.
- ^ Pinson et al. (2017). "The Separation of Generations: Biology and Biogeography of Long-Lived Sporophyteless Fern Gametophytes." International Journal of Plant Sciences 178(1):1-18.
- ^ a b Farrar, Donald R. (1992). "Trichomanes intricatum: The Independent Trichomanes Gametophyte in the Eastern United States." American Fern Journal, 82(2): 68-74.
- ^ Ebihara, Atsushi, Donald R. Farrar, and Motomi Ito (2008). "The sporophyte-less filmy fern of eastern North America Trichomanes intricatum (Hymenophyllaceae) has the chloroplast genome of an Asian species." American Journal of Botany, 95: 1645-1651.
- ^ Weakley et al. (2011). "Nomenclatural changes in the flora of the southeastern United States". Journal of the Botanical Research Institute of Texas 5(2): 443.
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