Monographs Details: Lagenocarpus pendulus T.Koyama
Authority: Maguire, Bassett. 1965. The Botany of the Guayana Highland. Mem. New York Bot. Gard. 12 (3): 1-285.
Family:Cyperaceae
Description:Latin Diagnosis - E vicinia L. sabanensis a qua tamen fructificationibus obovoideo-ellipsoideis, rostro parvi pubescenti, squamellis hypogynis longe-ciliatis, spieulis penduUs, squamis hyalinis valde distat. Sect. Lagenocarpus. Rhizoma crassiusculum decumbenti-ascendens usque ad 8 cm longum 17 mm crassum fibris fusco-brunneis vestitum. Folia in majore parte radiealia et 2 vel 3 superiora caulina; laminae anguste lineares 40-65 cm longae 3-5 mm latae plicato-planae rigidulae supra minutissime verruculosae ad apicem acutissimam sensim attenuantes subtus pallidiores et plerumque puberulentes; vaginae 2-3 cm longae sparse puberulentes mox glabrae apicem versus brunneotinctae, contraligula rotundo-deltoidea 2-3 m m longa, ciliata. Culmus solitarius centrahs 80-100 cm altus gracilescens obtuse trigonus facie canaliculatus apice puberulens basi mox glaber. Inflorescentia 30-60 cm longa apice cernua fasciculatopaniculata subcontigua vel plus minus interrupta, axe ramisque pubesulentibus, bracteis panicula sua multo brevioribus; paniculae partiales inferiores 2 masculae, ceterae foemineae, ramis ramulisque gracilibus pendulis, bracteolis vaginiformis. Spiculae masculae solitariae vel geminae 3 m m longae anguste ellipticae; glumae plures ellipticae acutae adpresse hispido-pubescentes; stamina plerumque 2. Spiculae foemineae solitariae uniflorae maturitate ellipsoideae 3.5 mm longae fulvo-brunneae; glumae imbricatae circiter 6, superiores late ellipticae 3 mm longae vix 2 mm latae hyalinae vel membranaceae polisulae margine sericeociliatae apice acutae vel leviter bilobae breviaristatae. Fructificationes glumas fere aequantes obovoideo-ellipsoideae cum rostro 2.5-3 mm longae 1.25-1.5 mm latae teretes trisulcatae fulvae apice abrupte contractae, rostro brevi conico 2/3 mm longo 1/3 mm lato pubescente, stigmatibus 3. Squamellae hypogynae 3 orbiculato-ovatae margine pilis albis dense ciliatae.

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

Discussion:This new species superficially resembles L. sabanensis, but differs from it by its peculiar features of spikelets: fructifications with short pubescent beak, conspicuously ciliate hypogynous squamellae, and thinly membranous pistillate glumes. Especially the first character shows an affinity of this taxon with the section Corymbosi, though it is placed in the section Lagenocarpus because of the shape of its inflorescence.