Hymenachne

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Genus of grasses

title: "Hymenachne" type: doc version: 1 created: 2026-02-28 author: "Wikipedia contributors" status: active scope: public tags: ["paspaleae", "poaceae-genera"] description: "Genus of grasses" topic_path: "general/paspaleae" source: "https://en.wikipedia.org/wiki/Hymenachne" license: "CC BY-SA 4.0" wikipedia_page_id: 0 wikipedia_revision_id: 0

::summary Genus of grasses ::

|image = Hymenachne amplexicaulis 1584.jpg |image_caption = Hymenachne amplexicaulis |display_parents = 4 |taxon = Hymenachne |authority = P.Beauv. |synonyms =

  • Dallwatsonia B.K.Simon
  • Panicum sect. Hymenachnae (P.Beauv.) Hack. |synonyms_ref =

Hymenachne, synonym Dallwatsonia, is a genus of widespread wetland plants in the grass family Poaceae. They are commonly known as marsh grasses. They are distributed in tropical and subtropical regions of Asia, the Americas, and the Pacific Islands. A species from the Americas, H. amplexicaulis, is well known in other parts of the world as an introduced and invasive species.

Description

Hymenachne species are aquatic plants frequently found in marshes and other wet habitats. Their stems may be spongy with aerenchyma tissue. The inflorescence is usually a cylindrical, spike-shaped panicle, rarely with branches.

Taxonomy

The genus Hymenachne was first described by Palisot de Beauvois in 1812. Hymenachne is similar to the genus Sacciolepis, Many species placed in Hymenachne have previously been placed in Sacciolepis.

In 1992, described a new genus Dallwatsonia for a single new Australian species he called Dallwatsonia felliana. The genus was named for the Australian botanists Michael Dallwitz and Leslie Watson. In 2014, ten further species were transferred from Panicum to Dallwatsonia by José Ramón Grande Allende, who noted that Dallwatsonia was closely related to Hymenachne, but could be distinguished by hollow rather than filled culms. However, a molecular phylogenetic study published in 2014 supported the synonymy of Dallwatsonia and Hymenachne, a conclusion also supported in a 2019 study. , Plants of the World Online accepted Dallwatsonia as a synonym of Hymenachne.

Species

, the following species were accepted:

; Formerly included

References

References

  1. [https://www.biodiversitylibrary.org/page/394127#page/132/mode/1up Palisot de Beauvois, Ambroise Marie François Joseph. 1812. Essai d'une Nouvelle Agrostographie pages 48-49] in Latin
  2. [https://www.biodiversitylibrary.org/page/394127#page/132/mode/1up Palisot de Beauvois, Ambroise Marie François Joseph. 1812. Essai d'une Nouvelle Agrostographie plate X (10), figure VIII (8 a-h) at upper right]; line drawings of ''Hymenachne'' sp.; [https://www.biodiversitylibrary.org/page/394127#page/274/mode/1up figure captions on caption page 8]
  3. [http://www.tropicos.org/Name/40029316 Tropicos, Hymenachne P. Beauv.]
  4. [https://www.itis.gov/servlet/SingleRpt/SingleRpt?search_topic=TSN&search_value=41777 ''Hymenachne''.] Integrated Taxonomic Information System (ITIS).
  5. Clarkson, J. R., et al. (2011). [http://rbgsyd.nsw.gov.au/__data/assets/pdf_file/0003/109290/Tel131-2105Cla.pdf A report of hybridisation in ''Hymenachne'' (Poaceae, Panicoideae) with description of ''Hymenachne'' × ''calamitosa'', a new species of hybrid origin from tropical Australia.] {{Webarchive. link. (2013-09-25 ''Telopea'' 13(1-2), 105-14.)
  6. {{GRIN. ''Hymenachne amplexicaulis''. 316039
  7. The longest stems can reach {{cvt. 4. m. ft
  8. {{IPNI
  9. (1992). "Studies in Australian Grasses 6. ''Alexfloydia'', ''Cliffordiochloa'' and ''Dallwatsonia'', three new panicoid grass genera from Eastern Australia". Austrobaileya.
  10. (2014). "Novitates Agrostologicae, IV. Additional segregates from ''Panicum'' incertae sedis". Phytoneuron.
  11. (2014). "A phylogenetic study of subtribe Otachyriinae (Poaceae, Panicoideae, Paspaleae)". Plant Systematics and Evolution.
  12. (2019). "Nuclear phylogeny and hypothesized allopolyploidization events in the Subtribe Otachyriinae (Paspaleae, Poaceae)". Systematics and Biodiversity.
  13. "''Hymenachne'' P.Beauv..".
  14. [https://www.ars-grin.gov/cgi-bin/npgs/html/splist.pl?5927 GRIN Species Records of ''Hymenachne''.] Germplasm Resources Information Network (GRIN)
  15. "Search for 'Hymenachne'". Royal Botanic Gardens, Kew.

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