Monographs Details: Bactris ptariana Steyerm.
Authority: Maguire, Bassett. 1972. The botany of the Guayana Highland--part IX. Mem. New York Bot. Gard. 23: 1-832.
Description:Distribution and Ecology - Distribution. Apparently endemic to the Guayana Highland in montane forests at about 600-2000 m elevation. GUYANA. Upper Mazaruni River Basin, Mt. Ayanganna, forest below talus from cliffs along NE side, 700-800 m, Tillett & Tillett 45037 (NY). VENEZUELA. Edo Bolivar: lower southeastern slopes of Carrao-tepui, alt 1675-1980 m, Steyermark 60869 (F); Terr. Amazonas, Cerro Sipapo (Paraque), in mixed montane forest below summit, alt 600-1500 m, Maguire & Politi 28799 (NY).
Type. Steyermark 60046, Venezuela, Edo Bolivar, SE-facing slope of Ptari-tepui, alt 1585-1600m (nv).
The type collection of Bactris ptariana could not be found in F, only the paratype, Steyermark 60869, was seen. This specimen resembles the two other cited collections so well that they are considered to be conspecific which extends the area of B. ptariana considerably. There are a few minor discrepancies between the original description and the three studied specimens: stem to about 3 m tall and 1-2 cm in diameter, leaves with distinctly aggregated pinnae all in the same plane, inflorescence up to about 3 dm long with only a few (2-10) rachillas about 1 dm long and 2 mm in diameter, fruit bright orange at maturity. Perhaps the type is an unusual tall specimen or the other collections have been taken from immature or depauperate plants.
Distribution:Guyana South America
| French Guiana South America
| Venezuela South America