Xyris frondosa Maguire & L.B.Sm.

  • Authority

    Maguire, Bassett & Wurdack, John J. 1964. The botany of the Guayana Highland--Part V. Mem. New York Bot. Gard. 10: 1-278.

  • Family

    Xyridaceae

  • Scientific Name

    Xyris frondosa Maguire & L.B.Sm.

  • Description

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    Latin Diagnosis - Herbae caulescentes, ramosae; foliis lineari-ensiformibus, laminam frondosam formantibus, 12-20 cm longis; vaginis 3-4 cm longis, apice anguste ligulatis et quam laminis paulo latioribus, ad basin versus gradatim ampliatis, glabris, laevibus, atro-castaneis, lucidis; laminis obtusis, 1.5-2 mm latis, sulcatis, anguste atro-marginatis, ciliatis, alibi glabris; scapo 12-28 cm alto, 0.5-0.8 mm diametro, subtereti, laevi; vagina scapi eis foliorum simili, brevissime laminata; spica obovoidea, 7-9 mm longa, pauciflora; bracteis ellipticis, late rotundatis, integris, apice minutissime albo-ciliatis, area dorsali angusta praeditis, basilaribus paulo reductis, alteris sepala bene superantibus; sepalis lateralibus liberis, paulo inaequilateralibus, ellipticis, obtusis, 4 mm longis, late carinatis, brevissime ciliatis: placentis basilaribus.

    Distribution and Ecology - Distribution. Known only by the cited collections.

  • Discussion

    Fig. 18, A-E.

    Type. Older leaves twisted, petals 4 mm long, 4 mm broad, frequent in scrub forest near Summit Camp, alt. 1925 m. Central Section, Chimanta Massif, 2 Feb 1955, Bolivar, Venezuela, J. A. Steyermark & J. J. Wurdack 346 (holotype NY, isotype US). Paratypes. Cerro Guaiquinima, Alto Rio Paragua, Bolivar, Venezuela, Oct 1943, F. Car dona 946 in part (NY, US); bog plant with yellow flowers, the most abundant of all savanna plants, open savannas 1 km south of Cumbre Camp, alt. 1800 m, 29 Dec 1951, B. Maguire 32798a.