Monographs Details: Conceveiba martiana Baill.
Authority: Maguire, Bassett. 1967. The botany of the Guayana Highland--Part VII. Mem. New York Bot. Gard. 17: 1-439.
Description:Distribution and Ecology - This species is restricted to the western Hylaea between Manaos, Brazil and Santiago, Peru, Cerro Neblina on the north and Humayta in the south. VENEZUELA. Amazonas: Cerro Yapacana at alt 1200 m, 5 Jan 1951, Maguire, Cowan & Wurdack 30743 (female NY, female calyx without glands); Cerro Neblina, Igarape forest of uppermost Rio Yaciba at alt 170 m, 12 Dec 1953, Maguire, Wurdack & Bunting 36765 (female NY); Cerro Neblina, Clusia forest just south of Camp 3 at alt 650 m, 29 Dec 1953, Maguire, Wurdack & Bunting 36969 (female, male NY). BRAZIL. Amazonas: Rio Negro Cocui, 14 Dec 1945, Froes 21516 (female NY); Rio Negro, Marabitanas, 20 Apr 1947, Murca Pires 487 (male NY), 486 (female NY) Municipality Sao Paulo de Olivenca, near Palmares, 11 Sep-26 Oct 1936, Krukoff 8390 ($ NY), 8608 (NYl ; Municipality Humayta, near Livramento, 12 Oct-6 Nov 1934, Krukoff 6798 (male NY), 7042 (female NY); Manaos, Estrada do Aleixo, 17 Oct 1935, Ducke 233 (male NY) 26 Dec 1936, Ducke 368 (male NY); circa Cachoeira do Mindu, 28 Dec 1940, Ducke 659 (female NY) PERU Mouth of Rio Santiago, Tessmann 4149 (male NY), 4353 male NY).


Type. “Martius, in suopte herbario, Brasilia" "Stirps arborescens a nobis olim in herb. cel. Martii, inter Antidesmeas cl. Tulasneo communicatas visa” (Baillon). Muller-Argoviensis in Flora Brasiliensis has extended the citation to read: “In silvis Japurensibus: Martius n. 2959.’’ Not seen. Photo of Poeppig & Tessmann 5275 (female, male NY) type of Conceveiba megalophylla Mull.-Arg.

Conceveiba. megalophylla Mull.-Arg., Linnaea 34: 167. 1S66. Alchornea martiana Miill.-Arg., Mart. FI. Bras. 11(2): 375. 1S74 Conceveibastrum martianum Pax <& K. Hoffm., Pflanzenreich 63: 217. 1914.

All collections available to Baillon, Muller-Argoviensis and Pax k K. Hoffmann were female; the flowers wore unknown to them which made it difficult for them to evaluate correctly its systematic position. The globose, tomentose non-angular fruit, distinctly cordate large leaves with huge stipules create an impressive distinction from C. guianensis, the type of the genus. Otherwise even the $ flower is basically similar with its narrow, gland-bearing calyx-lobes. More recent collections made by Krukoff, Ducke, and Pires have furnished good material of the male individuals and created a good connecting link to C. guianensis. The great number of stamens (40-50) differentiated into centrally located, long, plicate, sterile stamens (30-40) and short, fertile, peripherally located ones (8-12) are very similar to those of C. guianensis. The calyx lobes (5-6) are strictly valvate. The segregation of this species into a separate genus (Conceveibastrum) is not necessary.

Distribution:Venezuela South America| Brazil South America| Peru South America|