Monographs Details: Psychotria deflexa subsp. venulosa (Müll.Arg.) Steyerm.
Authority: Maguire, Bassett. 1972. The botany of the Guayana Highland--part IX. Mem. New York Bot. Gard. 23: 1-832.
Family:Rubiaceae
Description:Distribution and Ecology - Distribution. Northern Brazil and Venezuelan Guayana. VENEZUELA. Bolívar: laderas boscosas al norte del Salto Maria Espuma (Salto Ichun, a lo largo del Río Ichun (tributario del Río Paragua), lat 4° 46' N, long 63° 18' W, alt 625-725 m, 27 Dec 1961, Steyermark 90296; same locality, 28 Dec 1961, Steyermark 90354; a lo largo de la frontera Venezolano-Brasilera, noreste de la Serranía Pia-soi (Pia-shauhy, Pia-Savi), lat 3° 53' N, long 62° 46' W, alt 650-800 m, 5-6 Jan 1962, Steyermark 90676; Raudales de Maihia, a lo largo del Río Paragua, lat 4° 25' N, long 63° 7' W, alt 500-510 m, 1 Jan 1962, Steyermark 90523; region de los rios Icabaru, Hacha, y Cordillera sin nombre 280° de las cabeceras del Río Hacha, alt 450-850 m, 30 Dec 1955, Bernardi 2702; selvas pluviales riparias del Río Apacará, region de Uriman, alt 400-500 m, 15 Aug 1954, Bernardi 1429; vicinity of Techiné-merú, along Río Aparurén, between mouth of Río Aparurén and Kon-quen, alt 470 m, 8 Jul 1953, Steyermark 76044-A. Amazonas: selvas altas de Yavita, Alto Orinoco, alt 128 m, 3 Feb 1942, Williams 14163; Victorino, Guainia, Alto Rio Negro, alt 127 m, 22 Mar 1942, Williams 14839; Yavita, alt 128 m, 1942, Williams 16116; Solano, Bajo Casiquiare, alt 100 m, 11 Mar 1942, Williams 14745; caxoeira, San Sebastian, Río Casiquiare, 25 Sep 1928, Tate 150; Capihuara, Casiquiare, alt 120 m, 24 May 1942, Williams 15540; Cerro Duida, southeastern-facing slopes along Caño Negro (tributary of Caño Iguapo), alt 305 m, 25-26 Aug 1944, Steyermark 57962; Capihuara, Casiquiare, alt 120 m, June 1942, Williams 16109; Upper Río Orinoco, Cerro Yapacana, alt 100 m, Apr 1931, Holt & Blake 723; vicinity of San Carlos de Rio Negro, 17 Apr 1970, Steyermark & Bunting 102728; southeast of Base Camp, Cerro de la Neblina, Río Yatua, alt 140 m, 14 Dec 1953, Maguire, Wurdack & Bunting 36780; Cerro de la Neblina, limite Venezuela-Brazil, alt 1500 m, 29 Apr 1964, Ewel 197. BRAZIL. Amazonas: Rio Tipirico, afluente del Rio Cauaburí, alt 100 m, 13 Apr 1964, Ewel 96; along margin of Río Maturacá, between Missão Salesiana and Río Cauaburí, 8 Jan 1966, Silva & Brazao 60795.

Discussion:

Psychotria venulosa M. Arg., Mart. Fl. Bras. 6(5): 294. 1881.

Type. Prope San Gabriel da Cachoeira ad Rio Negro, Amazonas, Brazil, Jan-Aug 1852, Spruce 2067.

This taxon is differentiated from typical P. deflexa on the basis of its shorter and lanceolate stipular teeth and by the more pronounced tertiary venation on both sides of the leaf blades, on the upper side elevated with a transversely oblique, prominent reticulation. The lowest axes of the inflorescence are once-dichotomous and simple with a solitary sessile flower in the single fork with about 14-15 flowers (7 on each fork with 1 in the center of the fork) arranged unilaterally in two’s along the fork.

Distribution:Brazil South America| Venezuela South America| Guyana South America|