Pithecellobium arenicola R.S.Cowan

  • Authority

    Maguire, Bassett & Wurdack, John J. 1961. The botany of the Guayana Highland--part IV (2). Mem. New York Bot. Gard. 10: 1-87.

  • Family

    Mimosaceae

  • Scientific Name

    Pithecellobium arenicola R.S.Cowan

  • Description

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    Latin Diagnosis - Arbor 2-3 m alta vel arbuscula 0.3-1.5 m alta, ramulis puberulis, stipulis caducis, non visis. Petiolus 9-16 mm longus, puberulus, ad apicem glandula ovali 3 mm longa ornatus, rhachi (0-) 12-16 mm longa, puberula, pinnis 1-2-jugatis, petiolo secondario ca. 4 mm longo, rhachillis 7.5-16 cm longis, puberulis, petiolulis nullis. Foliola 16-24-jugata, rigida, glabra (puberula costa supra excepta), leviter falcata, lanceolata ad oblongo-lanceolata, 20-30 mm longa, 5-7 mm lata, ad basim inaequilateraliter rotundata, ad apicem acuta et mucronata, costa excentrica venis primariisque leviter impressis supra, infra leviter salientibus. Flores capitati, capitulis in racemis terminalibus dispositis, capitularum pedunculo 5-10 mm longo, dense puberulo, bracteis glandulas conspicuas ferentibus. Calyx minuto-strigulosus, viridis, tubo 6-7.5 mm longo, lobis 2.5-3.5 mm longis, anguste triangularibus, acutis; corolla luteo-gilva, minute strigulosa, tubo 15-17 mm longo, lobis 5.5-6 mm longis, ca. 2 mm latis, triangulari-lanceolatis. Filamenta glabra, ca. 40 mm longa, tubo ca. 20 mm longo; ovarium minute strigulosum, sessile. Fructus immaturus plus minusve oblongus, minute strigulosus, compressus.

  • Discussion

    Fig. 46.

    The shape of the leaflets of this savanna species (the specific epithet refers to the sand-inhabiting characteristic) separates it rather easily from its nearest relatives, of which P. aquaticum is perhaps as near as any. The latter species is also characterized by very small, insignificant glands on leaves and inflorescences; similarly placed glands are quite conspicuous in P arenicola.