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.
Family:Euphorbiaceae
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).

Discussion:

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|