Eleocharis reznicekii (cyperaceae), a new species from the mexican high plateau
Eleocharis reznicekii (Cyperaceae, subg. Eleocharis, series Eleocharis), is described and illustrated. It is morphologically intermediate between E. densa and two species of Eleocharis subseries Eleocharis (E. macrostachya and E. palustris). The new species differs in a combination of characters inc...
| Auteurs principaux: | , , , |
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| Format: | Online |
| Langue: | spa |
| Publié: |
Instituto de Ecología, A.C.
2007
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| Accès en ligne: | https://abm.ojs.inecol.mx/index.php/abm/article/view/1050 |
| _version_ | 1799771273768730624 |
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| author | González Elizondo, M. Socorro Rosen, David J. Carter, Richard Peterson, Paul M. |
| author_facet | González Elizondo, M. Socorro Rosen, David J. Carter, Richard Peterson, Paul M. |
| author_sort | González Elizondo, M. Socorro |
| collection | ABM |
| description | Eleocharis reznicekii (Cyperaceae, subg. Eleocharis, series Eleocharis), is described and illustrated. It is morphologically intermediate between E. densa and two species of Eleocharis subseries Eleocharis (E. macrostachya and E. palustris). The new species differs in a combination of characters including conspicuously compressed culms (3 to over 5 times wider than thick) and stylopodium sessile on a thin annular base. Eleocharis reznicekii differs additionally from E. densa by having relatively lax spikelets, mostly bifid styles, and achenes almost smooth at 30x. From E. macrostachya and E. palustris it is distinguished in its oblong to linear-oblong spikelets, the proximal floral scale clasping only 1/3 to slightly more than 1/2 of the culm, and the proximal plus 1-2(3) subproximal scales without a flower. Eleocharis reznicekii is known only from the state of Durango, in the Mexican high plateau and piedmont of the Sierra Madre Occidental. |
| format | Online |
| id | oai:oai.abm.ojs.inecol.mx:article-1050 |
| institution | Acta Botanica Mexicana |
| language | spa |
| publishDate | 2007 |
| publisher | Instituto de Ecología, A.C. |
| record_format | ojs |
| spelling | oai:oai.abm.ojs.inecol.mx:article-10502022-12-10T01:22:41Z Eleocharis reznicekii (cyperaceae), a new species from the mexican high plateau González Elizondo, M. Socorro Rosen, David J. Carter, Richard Peterson, Paul M. Cyperaceae Durango Eleocharis Mexico taxonomy Cyperaceae Durango Eleocharis México taxonomía Eleocharis reznicekii (Cyperaceae, subg. Eleocharis, series Eleocharis), is described and illustrated. It is morphologically intermediate between E. densa and two species of Eleocharis subseries Eleocharis (E. macrostachya and E. palustris). The new species differs in a combination of characters including conspicuously compressed culms (3 to over 5 times wider than thick) and stylopodium sessile on a thin annular base. Eleocharis reznicekii differs additionally from E. densa by having relatively lax spikelets, mostly bifid styles, and achenes almost smooth at 30x. From E. macrostachya and E. palustris it is distinguished in its oblong to linear-oblong spikelets, the proximal floral scale clasping only 1/3 to slightly more than 1/2 of the culm, and the proximal plus 1-2(3) subproximal scales without a flower. Eleocharis reznicekii is known only from the state of Durango, in the Mexican high plateau and piedmont of the Sierra Madre Occidental. Se describe e ilustra Eleocharis reznicekii (Cyperaceae, subg. Eleocharis, serie Eleocharis), especie con características morfológicas intermedias entre las de Eleocharis densa y las de dos especies de la subserie Eleocharis (E. macrostachya y E. palustris). Se distingue por tener tallos conspicuamente comprimidos (3-5 veces más anchos que gruesos en fresco) y estilopodio sésil sobre una base anular fina. De E. densa se distingue además por tener espiguillas menos densas, estilos en su mayoría bífidos y aquenio casi liso a 30x, más redondeado hacia el ápice. De E. macrostachya y E. palustris lo hace por su hábito más robusto, espiguillas oblongas a linear-oblongas, gluma proximal envolviendo únicamente 1/3 a poco más de 1/2 de la base de la espiga, y por tener la gluma proximal y 1 a 2(3) glumas subproximales sin flor. Hasta ahora, E. reznicekii se conoce solamente del estado de Durango, en el Altiplano Mexicano y piedemonte de la Sierra Madre Occidental. Instituto de Ecología, A.C. 2007-10-01 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion artículo evaluado por pares application/pdf https://abm.ojs.inecol.mx/index.php/abm/article/view/1050 10.21829/abm81.2007.1050 Acta Botanica Mexicana; No. 81 (2007); 35-43 Acta Botanica Mexicana; Núm. 81 (2007); 35-43 2448-7589 0187-7151 spa https://abm.ojs.inecol.mx/index.php/abm/article/view/1050/1211 Derechos de autor 2016 Acta Botanica Mexicana https://creativecommons.org/licenses/by-nc/4.0 |
| spellingShingle | González Elizondo, M. Socorro Rosen, David J. Carter, Richard Peterson, Paul M. Eleocharis reznicekii (cyperaceae), a new species from the mexican high plateau |
| title | Eleocharis reznicekii (cyperaceae), a new species from the mexican high plateau |
| title_full | Eleocharis reznicekii (cyperaceae), a new species from the mexican high plateau |
| title_fullStr | Eleocharis reznicekii (cyperaceae), a new species from the mexican high plateau |
| title_full_unstemmed | Eleocharis reznicekii (cyperaceae), a new species from the mexican high plateau |
| title_short | Eleocharis reznicekii (cyperaceae), a new species from the mexican high plateau |
| title_sort | eleocharis reznicekii (cyperaceae), a new species from the mexican high plateau |
| url | https://abm.ojs.inecol.mx/index.php/abm/article/view/1050 |
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