Xyris bicostata Maguire & L.B.Sm.
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Authority
Maguire, Bassett & Wurdack, John J. 1964. The botany of the Guayana Highland--Part V. Mem. New York Bot. Gard. 10: 1-278.
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Family
Xyridaceae
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Scientific Name
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Description
Latin Diagnosis - Herbae acaules, cespitosae; foliis ad 15 cm longis; vaginis 4-6 cm longis, sulcatis, pallide brunneis, apice eligulatis et cum laminis confluentibus, basi abrupte dilatatis et atrioribus, intus dense longeque ciliatis; laminis linearibus, acutis, 0.8 mm latis, sulcatis, margine paulo incrassatis et pallido-ciliatis; scapo 15-20 cm alto, subtereti, 0.5 mm diametro, bicostato, costis ciliatis exceptis glabro; vagina scapi omnino foliacea, longe laminata; spica anguste fusiforme, dein ex sicco obconica, 9-10 mm longa, biflora; bracteis lanceolatis, acutis, integris, glabris, valde carinatis, area dorsali magna lineari praeditis, basilaribus valde reductis, alteris sepala superantibus; sepalis lateralibus liberis, aequilateralibus, linearibus, acutis, 7 mm longis, anguste carinatis, glabris; placentis basilaribus.
Distribution and Ecology - Distribution. Known only by the type collection.
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Discussion
Fig. 14, A-F.
Type. Flowers yellow, frequent on mossy rocky banks, dense woodland along Right Fork of Cano de Dios, alt. 1800 m. Summit Camp, Cerro Huachamacari, Rio Cunucunuma, 13 Dec 1950, Amazonas, Venezuela, Bassett Maguire, R. S. Cowan & John J. Wurdack 30169 (holotype NY, isotypes S, VEN, US).