Monographs Details: Parachimarrhis breviloba Ducke
Authority: Maguire, Bassett. 1965. The Botany of the Guayana Highland. Mem. New York Bot. Gard. 12 (3): 1-285.
Family:Rubiaceae
Description:Distribution and Ecology - Distribution. Known only from the type collections of Brazil.

Discussion:Through the courtesy of the Director of the Herbarium of the Jardim Botanico de Rio Janeiro, I have had the privilege of examining the type material. All except two items check with Ducke's description: 1) the ovary is 2-celled instead of 3-4celled and 2) the calyx-lobes are ciliolate on the margins and not just apically as described originally. The valvate corolla-lobes indicate its relation with Chimarrhis and placement in the tribe Condamineae. Parachimarrhis is a distinct genus, separated from Chimarrhis and Elaeagia as follows: in Parachimarrhis the capsule is loeulicidally dehiscent, in Chimarrhis it is septicidally dehiscent; in Parachimarrhis there are 8-10 seeds in a capsule, and they are relatively large (2-2.5 mm long by 1.5 mm wide) and flattened, in Chimarrhis there are 20 or more seeds in a capsule, minute (1 m m or less long by 0.5 mm wide) and not flattened; in Parachimarrhis the filaments are pubescent except in the uppermost portion, in Chimarrhis they are bearded only at the base; in Parachimarrhis the corolla-lobes are very short, only 1/3 the length of the corolla-tube, in Chimarrhis they are usually equal to or longer than, but rarely shorter than the corolla-tube. The differences between Parachimarrhis and Elaeagia are as follows: in Parachimarrhis the stipules are small and caducous, in Elaeagia persistent at the tip and large; in Parachimarrhis the capsule has a conspicuous depression on each side, in Elaeagia it is more or less terete throughout; in Parachimarrhis the calyx-lobes are triangular and acute, in Elaeagia rounded, undulate, or not developed; in Parachimarrhis the seeds are relatively large (2-2.5 mm long by 1.5 mm wide), subflattened, and 8-10 in a capsule, in Elaeagia they are minute (1 mm or less long by 0.5 mm wide), not flattened, and 20 or more in a capsule; in Parachimarrhis the very short corolla-lobes are only 1/3 the length of the corolla-tube and erect, in Elaeagia they are 1/2 to equal to or longer than the corolla-tube and reflexed; in Parachimarrhis the corolla is pubescent within from the base up to the throat, in Elaeagia pubescent within only at the orifice; in Parachimeirrhis the filaments are inserted at the base of the corolla-tube, in Elaeagia they are inserted at the throat.
Distribution:Brazil South America|