Pilularia
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Pilularia or pillworts is a genus of unusual ferns of family Marsileaceae distributed in North Temperate regions, Ethiopian mountains, and the southern hemisphere in Australia, New Zealand, and western South America.
Depending on the taxonomic revisor, the genus contains between 3 and 6 species of small plants with thread-like leaves, and creeping rhizomes. The sporangia are borne in spherical sporocarps ("pills") which form in the axils of leaves. Pilularia minuta from SW Europe is one of the smallest of all ferns.
Phylogeny
Recent work from Pryer Lab[1] accepted four species of Pilularia, with a fifth, P. novae-zealandiae, being conspecific with P. novae-hollandiae. In addition, another species, P. dracomontana, has been described from South Africa.[2]
| Phylogeny of Pilularia[3][4] | Other species include: |
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References
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- ^ Page Module:Citation/CS1/styles.css has no content.Nagalingum, Nathalie S.; et al. (2008). "Assessing phylogenetic relationships in extant heterosporous ferns (Salviniales), with a focus on Pilularia and Salvinia" (PDF). Botanical Journal of the Linnean Society. 157 (4): 673–685. doi:10.1111/j.1095-8339.2008.00806.x. Retrieved 8 October 2014.
- ^ Page Module:Citation/CS1/styles.css has no content.Crouch, N. R. & J. Wesley-Smith. "Pilularia dracomontana, a new species of pillwort from the Kwazulu-Natal Drakensberg, South Africa". Archived from the original on 3 January 2015. Retrieved 8 October 2014.
- ^ Page Module:Citation/CS1/styles.css has no content.Nitta, Joel H.; Schuettpelz, Eric; Ramírez-Barahona, Santiago; Iwasaki, Wataru; et al. (2022). "An Open and Continuously Updated Fern Tree of Life". Frontiers in Plant Science. 13 909768. doi:10.3389/fpls.2022.909768. PMC 9449725. PMID 36092417.
- ^ Page Module:Citation/CS1/styles.css has no content."Tree viewer: interactive visualization of FTOL". FTOL v1.7.0 (GenBank release 261). 2024. Retrieved 1 May 2025.
- ^ Phytotaxa
- UK Biodiversity Action Plan
- Preston, C.D. & Croft, J.M. (1997). Aquatic Plants in Britain and Ireland. Harley Books, pp. 31–32.
External links
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