Conceveiba guianensis Aubl.
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Authority
Maguire, Bassett. 1967. The botany of the Guayana Highland--Part VII. Mem. New York Bot. Gard. 17: 1-439.
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Family
Euphorbiaceae
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Scientific Name
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Discussion
Conceveiba simulata Steyermark, Field Mus. Publ. Bot. 17: 416. 1938 (type, Krukoff 8616).
Conceveiba krukoffii Steyermark, Field Mus. Publ. Bot. 17: 414. 1938. (type, Krukoff 8396).
Type. “Habitat ad ripas fluvii Sinemari & amnis Galibiensis.” Originally described without male flower. Muller-Argoviensis cites 3 specimens from French Guiana: Poiteau, Leprieur n. 315, Sagot n 508; which of these is Aublets type, he doesn’t say. All he says about male flowers; “Flores masc. aperientes 1 mm lati.” The figure in Flora Brasiliensis depicts the male flower as carrying a great number of sterile, ribbon-like stamens and a few wide-filamented stamens. The origin of the specimen is not mentioned.
Note that all of the male specimens come from the westernmost margin of the distribution area. These were separated under the name of C. simulata Steyerm. and were thought to differ from C. guianensis in “much shorter staminate inflorescence, and in possessing a greater number of fertile and sterile stamens, usually 9 fertile and 9-10 sterile.” But since there is not a single male specimen from the type locality or from the east it is difficult to work out a basis for distinction. C. krukoffii Steyermark was thought to differ “from C. guianensis principally in the longer style column, 3 mm long,” but the type is a juvenile specimen and the length of style column seems to be very variable. The Bolivar specimens (all fruit) approach C. hostmanni in so far as the fruits are globose, not alate, and the leaves tend to be subcordate at the base.
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Distribution
Guianas, Delta Amacuro, the Hylaea, Upper Orinoco, Bolivar, Mato Grosso and eastern Peru. It is not known south of the Hylaea.
Suriname South America| Brazil South America| Peru South America| Guyana South America| Venezuela South America|