Monographs Details: Psychotria calciphila 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 - Frutex 2-metralis, ramis glabris; stipulis oblongis obtusis 3-4.5 × 2 mm glabris; foliis oppositis petiolatis, petiolis 1.7-2.1 cm longis glabris; laminis firme membranaceis ellipticis vel oblanceolato-ellipticis apice acutis basi cuneatim acuminatis 8-11 × 3.5-4 cm ubique glabris marginibus opacis subcartilagineis, nervis lateralibus utroque latere 7-8 adscendentibus tenuissimis supra tenuite impressis subtus paullo elevatis ante marginem 2-5 mm manifeste anastomosantibus; inflorescentia depresso-hemisphaerico-subcorymbosa 2-3 cm longa 2-5 cm lata trichotome ramosa, axibus principalibus tribus 7-10 mm longis glabris tenuibus, axibus secundariis trichotomis tenuibus 4-6 mm longis, axibus ultimis 2-3 mm longis 2-3-floris glabris vel uno latere minute papillato-puberulo; pedunculo tenui 20-33 mm longo 1.2 mm lato glabro angulato; floribus omnino pedicellatis, pedicellis 0.5-1 mm longis glabratis; bracteis inferioribus inflorescentiae patentibus lanceolatis acuminatis vel cuspidatis 1-1.5 mm longis basi pilis fimbrillatis praeditis ceterum glabris; bracteis superioribus lanceolatis vel ovato-lanceolatis 0.6-0.7 mm longis acutis vel subacutis glabris vel parce ciliolatis; calyce hypanthioque 1-1.5 mm longo glabro, hypanthio breviter campanulato 0.7-0.8 mm longo 0.8-1 mm lato; calyce 0.5-0.7 mm longo 1.5-1.9 mm lato manifeste dentato, dentibus quinque late triangularibus acutis 0.2 mm longis 0.7-0.8 mm latis glabris haud ciliatis; disco tubo calycis paullo breviore; corolla infundibuliformi 4-5 mm longa extus glabra cystolithis manifeste praedita, tubo 2-2.5 mm longo basi 1 mm lato fauce 2-2.2 mm lato intus parte basilari 1.5 mm glabro deinde sursum barbato, lobis quinque lanceolatis acutis 2.1-2.5 × 0.8-0.9 mm apice incurvatis cucullatis haud incrassatis; staminibus exsertis, antheris oblongis 0.8-1 × 0.4-0.5 mm, filamentis 1.5 mm longis; stylo 1.8 mm longo glabro; bacca ovoideo-subglobosa 6-7 mm longa 4-6 mm lata glabra valde acutate costata.

Discussion:

Type. Selva tropofila con peñascos calcáreos cerca del Puente de Jobo, entre Curimagua y San Luis, Sierra de San Luis, Estado Falcon, Venezuela, alt 800-900 m, 20 Jul 1967, shrub 2 m; leaves shining and deep green above, pale green below, firmly membranous; corolla greenish-white, lobes recurved, Julian A. Steyermark 99251.

Paratypes: Estado Falcon: alrededores de Pueblo Nuevo, Paraguana, 14 Dec 1964, Ruiz-Teran 2042. D.F.: Cerro Naiguata, Lomas de Las Delicias, entre Quebrada de Basenilla y Quebrada Guayoyo, 9-12 km SE of Hacienda Cocuizal, arriba del pueblo de Naiguata, alt 1000-1300 m, 15-19 Nov 1963, Steyermark 92098.

This species simulates P. glabrata Sw. in leaf shape. From the similar-appearing P. horizontalis Sw., it differs in the larger fruits and shorter calyx lobes.