TY - JOUR
T1 - Three new species of eleocharis subg. Scirpidium (Cyperaceae) and a key to identify the Subgenus in Brazil
AU - Trevisan, Rafael
AU - González-Elizondo, M. Socorro
AU - Weber, Philipy Alexandre Pereira
AU - Boldrini, Ilsi Iob
PY - 2014/7
Y1 - 2014/7
N2 - Three new species of Eleocharis R. Br. subg. Scirpidium (Nees) Kukkonen (Cyperaceae) from southern Brazil are described and illustrated: E. angustirostris R. Trevis. & Boldrini, E. neesii R. Trevis. & Boldrini, and E. riograndensis R. Trevis. & Boldrini. They have fertile proximal scales and achenes with longitudinal rows of horizontally oriented rectangular cells, characteristic of Eleocharis subg. Scirpidium. Eleocharis angustirostris is distinguished from all the Brazilian species of the subgenus by the achene narrowing into a neck and the narrow stylopodium that appears to be a continuation of the neck; E. neesii is related to E. radicans (Poir.) Kunth from which it differs in having capillary culms and an inflated apex of the distal sheath. Eleocharis riograndensis is distinguished from all the Brazilian species of Eleocharis subg. Scirpidium by a combination of features including capillary culms, the long acuminate distal sheath apex, and two stamens with short anthers. A key is presented to separate the species of Eleocharis subg. Scirpidium known to occur in Brazil.
AB - Three new species of Eleocharis R. Br. subg. Scirpidium (Nees) Kukkonen (Cyperaceae) from southern Brazil are described and illustrated: E. angustirostris R. Trevis. & Boldrini, E. neesii R. Trevis. & Boldrini, and E. riograndensis R. Trevis. & Boldrini. They have fertile proximal scales and achenes with longitudinal rows of horizontally oriented rectangular cells, characteristic of Eleocharis subg. Scirpidium. Eleocharis angustirostris is distinguished from all the Brazilian species of the subgenus by the achene narrowing into a neck and the narrow stylopodium that appears to be a continuation of the neck; E. neesii is related to E. radicans (Poir.) Kunth from which it differs in having capillary culms and an inflated apex of the distal sheath. Eleocharis riograndensis is distinguished from all the Brazilian species of Eleocharis subg. Scirpidium by a combination of features including capillary culms, the long acuminate distal sheath apex, and two stamens with short anthers. A key is presented to separate the species of Eleocharis subg. Scirpidium known to occur in Brazil.
KW - Brazil
KW - Cyperaceae
KW - Eleocharis
KW - IUCN Red List
KW - Rio Grande do Sul ,subgenus Scirpidium
UR - http://www.scopus.com/inward/record.url?scp=84904607608&partnerID=8YFLogxK
U2 - 10.3417/2010031
DO - 10.3417/2010031
M3 - Artículo
SN - 1055-3177
VL - 23
SP - 236
EP - 240
JO - Novon
JF - Novon
IS - 2
ER -