Monographs Details: Perama plantaginea (Kunth) Hook.f.
Authority: Maguire, Bassett & Wurdack, John J. 1964. The botany of the Guayana Highland--Part V. Mem. New York Bot. Gard. 10: 1-278.
Family:Rubiaceae
Description:Distribution and Ecology - Distribution: at low altitudes in drainage of the upper Rio Negro and Orinoco from the rivers Orinoco, Guainia, and Negro in Venezuela, to the Rio Igana in Amazonian Brazil. VENEZUELA. Amazonas: locis humidis prope Javita Orinocensium, Humboldt & Bonpland 974 (photo of holotype at B in F, NY); bog, Rio Negro, at base of Cerro Cucuy, 2 Mar 1944, J. T. Baldwin, Jr. 3213 (F, US, VEN); a lo margo de un camino en la selva de Maroa; alt. 127 m; hierba de 15 a 30 cm; alrededor de los arboles; 9 Feb 1942, Llewelyn Williams 14198 (F); en la selva alta, tupida de Yavita; alt. 128 m; 24 Jan 1942, Williams 13967 (F); cienega de ciperaceas, cerca Jacamin, Rio Casiquiare; 25 Jan 1958, Vareschi & Madge fau 6740 (VEN); infrequent in forest near Base Camp, Cerro Sipapo (Paraque); alt. 125 m; perennial herb; flowers white; 1 Jan 1949, Maguire & Politi 28061 (NY); occasional in sabanita along Yavita-Pimichin trail near Pimichin, Rio Guainia; alt. 120-140 m; 22 Nov 1953, Maguire, Wurdack, & Bunting 36325 (NY); frequent in sabanita 1 km east of Maroa, Rio Guainia; alt. 125 m; 16 Apr 1953, Maguire & Wurdack 35691 (NY); occasional in savanna 0.5 k m east of Maroa, Rio Guainia; alt. 130 m; 6 Oct 1957, Maguire, Wurdack, Keith, & C. K. Maguire 41712 (NY); Sabana Manacal, Rio Atabapo, 15 km above Guarinumo; alt. 125 m; 12 Jun 1959, Wurdack & Adderley 42955 (NY). COLOMBIA. Vaupes: frequent in sabanita 0.5-1.5 km north of Puerto Colombia (opposite Maroa); alt. 130 m; 12 Oct 1957, Maguire, Wurdack, Keith, & C. K. Maguire 41854 (NY). BRAZIL. Amazonas: Boca do Igana, Estacamento, caatinga baixa; arbusto, 20-40 cm; flor branca; 17 M a y 1948, Black 48-2727 (NY); Rio Igana, Tunui; 1947, J. Murga Pires 1910 (NY).

Discussion:

Fig. 78, A-C.

Bucliia plantaginea H.B.K. Nov. Gen. & Sp. 2: 270. pl. 132. 1819.

This species was originally described by Humboldt, Bonpland, & Kunth in the verbenaceous genus Buchia and later transferred to its proper position in the Rubiaceae as congeneric with Perama by Hooker filius in Bentham & Hooker's Genera Plantarum. K. Schumann in the Flora Brasiliensis gave it only brief mention, while Standley, in his Rubiaceae of Venezuela (Field Mus. Bot. Ser. 7: 475. 1931) knew it only from a photograph of the holotype specimen, likewise describing the species very briefly.

Some variation is shown in the amount of indument of the lower surface of the leaf-blades, in leaf-shape, and in length of peduncle. In Wurdack & Adderley 42955 one specimen of the collection has sessile heads, whereas most of the inflorescences in the same collection are variously pedunculate. Also, in this collection the lower surface of the leaf-blades are only sparsely sericeous to nearly glabrate. There is likewise variation in habit from subacaulescent herbaceous stems to elongated subligneous ones with elongated internodes.

Distribution:Venezuela South America| Colombia South America| Brazil South America|