Monographs Details: Gonzalagunia cornifolia (Kunth) Standl.
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. Colombia and Venezuela. VENEZUELA. Portuguesa: Puente La Portuguesa, Guanare, 1 Nov 1953, Trujillo 1822; Guanare, 29 Jan 1947, Curran 263 M. Barinas: Madre del Monte-Curbatico, Municipio Pedraza, alt 300 m, 11 Dec 1956, Bernardi 1738; 25 km from Barinas along road to San Cristobal, alt 300 m, 13 Jul 1964, Breteler 3992; near Barinitas, 70° 40' W, 8° 45' N, alt 600 m, 15 Oct 1963, Breteler 3151; Ticoporo Forest Reserve, 70° 40' W, 7° 55' N, near Río Michay, alt 300 m, 15 Mar 1964, Breteler 3725. Zulia: vegas del Río Santa Ana, 10 Dec 1922, Pittier 10908; Rio Negro, Perija, alt 280 m, 22 Dec 1947, Gines 1068. COLOMBIA. Santander: 20 km E of Puerto Olaya, alt 150 m, 11 May 1944, Fosberg 21920; Cordillera de la Paz, Filo de Alto Viento, eastern side, lat 6° 39' N, long 73° 15' W, alt 770 m, 21 Jul 1944, St. John 20580. Antioquia: border between Dept. Antioquia and Dept. Bolívar, near confluence of the rivers Ité and Tamar into the river Cimitarra, 38 km W of Barranca-bermeja (74° 15' W, 6° 55' N), alt 100 m, 2 Mar 1967, de Bruijn 1549; edge of rainforest, Quebrada San Julian, between Argelia and El Tigre, alt 1800 m, 29 May-1 Jun 1944, Ewan 15781; Puerto Berrio, vicinity of Medellin, Toro 1102. Tolima: El Convenio, west of San Lorenzo, alt 500-700 m, Pennell 3506. Cauca: La Manuelita, near Palmira, eastern side of Cauca Valley, alt 1100-1302 m, Dec 1905-Jan 1906, Pittier 802.

Discussion:

Gonzalea cornifolia H.B.K., Nov. Gen. & Sp. 3: 416. 1819.

Gonzalagunia panamensis var cornifolia (H.B.K.) Schum., Mart. Fl. Bras. 6(6): 293. 1889.

Type. Honda, Colombia, Bonpland.

The collections of Ewan 15781 and Toro 1102 are near or border the type locality. In addition to the shorter corolla characteristic of G. cornfolia, they show the outer surface of the corolla tube sparsely to moderately appressed pubescent but glabrous within at and near the base, becoming sparsely puberulous above and flocculous-puberulent around the orifice, and the hypanthium suburceolate and moderately strigose without. Contrasted with topotypical material of G. cornifolia from Colombia, topotypical material of G. panamensis (Cav.) Schum. from Panama (as represented by Pittier 3785 from the Canal Zone between Gamboa and Cruces) has longer corollas (13-17 mm), the outer surface of the corolla tube more sparsely strigillose, the calyx tube and campanulate hypanthium more sparsely strigillose, the upper leaf surface more prominently and densely scabridulous or hirtellous, and longer petioles. Material from Central America and Mexico is conspecific with G. panamensis from Panama, as well as material from the Department of Magdalena, Colombia. Standley assigned material from Colombia, Ecuador, and Peru to G. cornifolia, but none from Venezuela. Instead, he cited G. panamensis from Venezuela (Field Mus. Publ. Bot. 7: 383. 1931) on the basis of Pittier 10908 from Estado Zulia. An examination of this specimen shows a corolla length of 9 mm, which is much shorter than the usual corolla length of G. panamensis, which varies from 13-17 mm long. Actually, the corolla length of the Pittier specimen accords with the shorter length of the corolla in other specimens of G. cornifolia from Colombia and Venezuela, which show a variation in length from 7-11.5 mm. All the Venezuelan specimens, previously determined as G. panamensis, belong properly to G. cornifolia. The material from Ecuador and Peru, which has been called G. cornifolia, shows the hypanthium more densely sericeous-strigillose and/or the leaves below densely pubescent.

Distribution:Colombia South America| Venezuela South America|