Monographs Details: Sphinctanthus polycarpus (H.Karst.) Hook.f.
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. Eastern Colombia and southwestern Venezuela. VENEZUELA. Apure: Reserva Forestal San Camilo: selva siempreverde a lo largo de la Quebrada Botina, unos 2 km al suroeste del Caserio San Camilo (El Nula), alt 250 m, 28 Mar 1968, Steyermark, Bunting & Blanco 101471; Reserva Forestal San Camilo, en las faldas pedregosas y en las zonas adyacentes planas al sur del Caserio San Camilo (El Nula), hacia el Río Sarare, alt 280-300 m, 27 Mar 1968, Steyermark, Bunting & Blanco 101391. COLOMBIA. Intend, del Meta: am ufer des unteren Río Zanza, nördliche Sierra de la Macarena, alt 300 m, 2 Mar 1956; Llano de S. Meta, Karsten s n.

Discussion:

Conosiphon polycarpon Karst, in Linnaea 30: 155. 1859; Fl. Colomb. 2: 95. pl. 149. 1865.

Type. In convallibus fluminis Metae, Colombia, alt 300-400 m, Karsten.

The calycine glands are in groups below the sinuses of the calyx about halfway between the calyx teeth at the base of the calyx tube and show pubescent areas around the base of each group of glands. As in S. striiflorus the exterior surface of the corolla tube has a strigillose indument with a zone of antrorse hairs alternating with one of retrorse tomentum. The usual color recorded for the corolla is yellow on the lobes with purple-brown spots and pale green on the tube. Although Karsten described the flowers as “glomerato-cymosis,” only two may be present terminating the branches on some specimens. In the specimens examined, the annulus is located in the basal portion of the corolla tube 4-5 mm above the base. The leaves are barbate beneath in the axils, as they may or may not be in S. maculatus.

If S. maculatus is eventually united with S. polycarpus, the latter name has priority. There is considerable doubt, in view of recent collections of S. polycarpus from Venezuela, whether S. maculatus can be separated. Collections from Peru, such as Tessmann 4229, with the annulus located near the basal portion of the tube, show the tendency to merge these taxa.

Distribution:Colombia South America| Venezuela South America|