Rhynchospora mesoatlantica (Cyperaceae), an imperiled new species of beaksedge from eastern U.S.A.
Rhynchospora mesoatlantica sp. nov. (Cyperaceae) is described, illustrated, and compared with morphologically similar species. Rhynchospora mesoatlantica is known only from southern Delaware, southeastern Maryland, and southern New Jersey, all within the Mid-Atlantic region of the U.S.A. It inhabits...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
Pensoft Publishers
2023-12-01
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| Series: | PhytoKeys |
| Online Access: | https://phytokeys.pensoft.net/article/111271/download/pdf/ |
| _version_ | 1797418505660792832 |
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| author | Amanda Treher Eberly Robert F. C. Naczi |
| author_facet | Amanda Treher Eberly Robert F. C. Naczi |
| author_sort | Amanda Treher Eberly |
| collection | DOAJ |
| description | Rhynchospora mesoatlantica sp. nov. (Cyperaceae) is described, illustrated, and compared with morphologically similar species. Rhynchospora mesoatlantica is known only from southern Delaware, southeastern Maryland, and southern New Jersey, all within the Mid-Atlantic region of the U.S.A. It inhabits sunny, wet margins of natural, shallow, nutrient-poor, seasonal ponds of the Coastal Plain. Narrow leaf blades; fruits obpyriform in outline; faces of mature fruits possessing a central, pale, well-demarcated disk; and fruit tubercle margins denticulate for most of their lengths indicate R. mesoatlantica is most similar to R. filifolia and R. harperi. Rhynchospora mesoatlantica is unique in its fruit dimensions, scales intermediate in length between R. filifolia and R. harperi, and relatively long fruit stipe. The NatureServe rank of Critically Imperiled and the IUCN rank of Endangered appear warranted for R. mesoatlantica because only six populations are known to be extant, most quite small and isolated; all populations occur within a small geographic area; populations have declined; and serious threats confront the survival of the species. |
| first_indexed | 2024-03-09T06:34:52Z |
| format | Article |
| id | doaj.art-15f50a7a592245048248fc1c14306692 |
| institution | Directory Open Access Journal |
| issn | 1314-2003 |
| language | English |
| last_indexed | 2024-03-09T06:34:52Z |
| publishDate | 2023-12-01 |
| publisher | Pensoft Publishers |
| record_format | Article |
| series | PhytoKeys |
| spelling | doaj.art-15f50a7a592245048248fc1c143066922023-12-03T11:00:05ZengPensoft PublishersPhytoKeys1314-20032023-12-01236658110.3897/phytokeys.236.111271111271Rhynchospora mesoatlantica (Cyperaceae), an imperiled new species of beaksedge from eastern U.S.A.Amanda Treher Eberly0Robert F. C. Naczi1NatureServeNational Museum of Natural History, Smithsonian InstitutionRhynchospora mesoatlantica sp. nov. (Cyperaceae) is described, illustrated, and compared with morphologically similar species. Rhynchospora mesoatlantica is known only from southern Delaware, southeastern Maryland, and southern New Jersey, all within the Mid-Atlantic region of the U.S.A. It inhabits sunny, wet margins of natural, shallow, nutrient-poor, seasonal ponds of the Coastal Plain. Narrow leaf blades; fruits obpyriform in outline; faces of mature fruits possessing a central, pale, well-demarcated disk; and fruit tubercle margins denticulate for most of their lengths indicate R. mesoatlantica is most similar to R. filifolia and R. harperi. Rhynchospora mesoatlantica is unique in its fruit dimensions, scales intermediate in length between R. filifolia and R. harperi, and relatively long fruit stipe. The NatureServe rank of Critically Imperiled and the IUCN rank of Endangered appear warranted for R. mesoatlantica because only six populations are known to be extant, most quite small and isolated; all populations occur within a small geographic area; populations have declined; and serious threats confront the survival of the species.https://phytokeys.pensoft.net/article/111271/download/pdf/ |
| spellingShingle | Amanda Treher Eberly Robert F. C. Naczi Rhynchospora mesoatlantica (Cyperaceae), an imperiled new species of beaksedge from eastern U.S.A. PhytoKeys |
| title | Rhynchospora mesoatlantica (Cyperaceae), an imperiled new species of beaksedge from eastern U.S.A. |
| title_full | Rhynchospora mesoatlantica (Cyperaceae), an imperiled new species of beaksedge from eastern U.S.A. |
| title_fullStr | Rhynchospora mesoatlantica (Cyperaceae), an imperiled new species of beaksedge from eastern U.S.A. |
| title_full_unstemmed | Rhynchospora mesoatlantica (Cyperaceae), an imperiled new species of beaksedge from eastern U.S.A. |
| title_short | Rhynchospora mesoatlantica (Cyperaceae), an imperiled new species of beaksedge from eastern U.S.A. |
| title_sort | rhynchospora mesoatlantica cyperaceae an imperiled new species of beaksedge from eastern u s a |
| url | https://phytokeys.pensoft.net/article/111271/download/pdf/ |
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