Bactris corossilla H.Karst.
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Authority
Maguire, Bassett. 1972. The botany of the Guayana Highland--part IX. Mem. New York Bot. Gard. 23: 1-832.
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Family
Arecaceae
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Scientific Name
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Description
Distribution and Ecology - Distribution. The species is known from various localities in northwestern South America, usually in the understory of forests on mountain-slopes at lower and middle elevations, below 1000 m altitude. VENEZUELA. Edo Bolivar: bosques entre el Rio Parami chi y El Salto de Chalimano sureste hacia la frontera Venezolano-Brasilera, noroest de la Serrania Pia-soi, alt 525-650 m, Steyermark 90596 (VEN).
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Discussion
Type. Not designated.
Bactris corossilla, originally described from the foothills of the Andes, was collected several times by Steyermark in the Guayana Highland usually, however, at the foot of the mountains: only one collection originates from a somewhat higher locality. Two Steyermark specimens, 57908, 57933 (F), from the SE base of Cerro Duida, 215-225 m elevation, have been described as B. duidae and B. venezuelensis, respectively, but they cannot be separated from and are conspecific with B. corossilla. This species is remarkable in having often simple bifid leaves but in older plants leaves tend to be more or less pinnate often with a pair of very broad apical segments. This was observed in populations in the Andes as well as in material originating from the Coastal Range in Venezuela and the Guayana Highland, in the last case forming the distinction between B. duidae and B. venezuelensis. Such a dimorphism of the foliage of younger and/or poorly developed plants and older well-developed plants is known from several species of the genus Bactris and other genera with a retention of juvenile foliage and usually a reduced habit.
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Distribution
Distribution. The species is known from various localities in northwestern South America, usually in the understory of forests on mountain-slopes at lower and middle elevations, below 1000 m altitude.
South America| Venezuela South America|