Monographs Details: Guettarda roupalaefolia Rusby
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. Coastal Cordillera of Venezuela and northeastern Colombia (Magdalena). VENEZUELA. Miranda: quebrada NW of electric plant of Electricidad de Caracas, Curupao, N of Guarenas, alt 400 m, 1 Jun 1963, Steyermark & Farinas 91487; Santa Lucia, alt 150-200 m, 6-8 Mar 1943, Killip & Tamayo 37060; Cerros immediatos a Petare, carretera a Santa Lucia, 28 Jul 1959, Trujillo 4317, 4333; alrededores de Los Chorros, Dec 1949, Trujillo & Fernandez 716. D.F.: Cotiza, cerca de Caracas, 24 Jun 1917, Pittier 7222 (type collection of Guettarda caracasana Standl, ex Pittier); Quebrada de Cotiza, Caracas, 26 Jun 1918, Pittier 7896; Quebrada de Gamboa, cerca de Caracas, alt 1000 m, 10 Jul 1921, Pittier 9622; terrenos bajo Catuche, alt 1000-1200 m, 27 Jul 1917, Pittier 7282; hills above Sosa, May 1938, Tamayo 540; between Caracas and La Guaira, Oct 1916, Rose & Rose 21908; parte superiore de las Colinas de Sosa, Aug 1938, Tamayo 608; Cerros adyacentes Hacienda Sosa, El Valle, alt 800-1000 m, 23 Sep 1949, Trujillo & Fernandez 421; Colinas de El Paraiso, Caracas, Nov 1970, Aristeguieta & Morillo 7679. Aragua: Guamitas, Parque Nacional, alt 740 m, 25 Jun 1938, Williams 12038. Falcon: Sierra de San Luis, selva tropófila con peñascos calcareos cerca del Puente de Jobe, entre Curimagua y San Luis, alt 800-900 m, 20 Jul 1967, Steyermark 99293. COLOMBIA. Magdalena: Minca, Santa Marta; 3 mi NE of Masinga, H. H. Smith 441 (type collection of G. roupalaejolia Rusby).

Discussion:

Guettarda caracasana Standl. ex Pittier, Pl. Usual. Venez. 197. 1926, nomen nudum; Field Mus. Publ. Bot. 8: 59. 1930.

Lectotype. Minca, Santa Marta, Colombia, alt 606 m, Jul 1898-99, H. H. Smith 441, flowering specimen; syntype: 3 mi NE of Masinga, Magdalena, Colombia, alt 151 m, 12 Jun 1898-99, H. H. Smith 441; near Masinga, alt 121 m, 31 Jul 1898-99, H. H. Smith 441, fruiting specimen.

I can find no differences to distinguish G. roupalaejolia from G. caracasana, both of them having flowers of similar size, with glabrous styles, interior of corolla tube glabrous, 4-celled ovary, and the same pubescence of foliage, calyx, hypanthium, and corolla exterior. Although Rusby states the dimensions of the corolla (Descr. N. Sp. S. Am. PI. 135. 1920) as “tube 12 mm long” and “lobes 6 mm long, 4 mm wide,” which would place the corolla length at 18 mm, the actual length of boiled material from the type collection measures 22 mm (tube 16 mm, lobes 5.5-6 mm).

Four specimens (two flowering and two fruiting) are indicated as the type collection of G. roupalaefolia Rusby (H. H. Smith 441) at NY from different localities within the same general area. I have selected as lectotype the flowering specimen from “Minca, Santa Marta, Colombia, alt 606 m, July.” The flowering specimen from “3 mi NE of Masinga, alt 151 m, 12 June” has the petioles up to 5 cm long and leaves larger than usual, up to 19 × 10 cm, but in all other respects is identical with specimens passing as G. caracasana.

The corolla lobes and stamens vary in number from 4 to 6, and the cells of the ovary and fruit from 4- to 5-celled. The fruit, which is oblong-ovoid, is 15-17 × 11-12 mm, densely tomentose-velutinous covered with scattered short, spreading, stiffer hairs, at first gray yellow-green, but eventually turning blackish-purple, and crowned by a persistent calyx tube 2-3 mm long. The lower surface of the leaves is usually densely and softly pubescent, but may become less pubescent on fruiting branches as in Aristeguieta & Morillo 7679.

Distribution:Venezuela South America| Colombia South America|