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POLEMONIUM ELUSUM (POLEMONIACEAE), A NEW SPECIES FROM EAST CENTRAL IDAHO, U.S.A.

Joshua J. Irwin, Rebecca Stubbs and Ronald L. Hartman
Journal of the Botanical Research Institute of Texas
Vol. 6, No. 2 (23 NOVEMBER 2012), pp. 331-338
Stable URL: http://www.jstor.org/stable/41972418
Page Count: 8
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Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
POLEMONIUM ELUSUM (POLEMONIACEAE), A NEW SPECIES FROM EAST CENTRAL IDAHO, U.S.A.
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Abstract

Botanical inventory of the Salmon-Challis National Forest has led to the discovery of a new species, Polemonium elusum. It may be distinguished from congeners by calyx lobes that are green to purplish with whitish, translucent membranes, oblong to spathulate, 0.4-0.7 mm wide connecting them. The presence of the membrane is unique to the genus. It is restricted to nine locations near the Salmon River between Salmon and Challis. In addition to the distinguishing morphometric features, DNA sequence analysis of the ITS1, 5.8s, and ITS2 nuclear ribosomal DNA supports P. elusum as a distinct species. El inventario botánico del Salmon-Challis National Forest ha permitido el descubrimiento de una nueva especie, Polemonium elusum. Puede diferenciarse de sus congéneres por los lóbulos del cáliz que son de verde a purpúreos conectados por membranas blanquecinas translúcidas de oblongas a espatuladas, 0.4-0.7 mm de anchas. La presencia de la membrana es única en el género. Está restringida a nueve localizaciones cerca del río Salmon entre Salmon y Challis. En adición a las características morfométricas diferenciadoras, el análisis de secuencias de ADN del ITS1, 5.8s, y el ADN nuclear ribosómico ITS2 suportan P. elusum como una especie distinta.

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