Seeds ovoid-ellipsoid, angular, 8-10 mm. long, 6-7 mm. 
in diameter, reticulate-pitted, dark brown. Embryo 
straight, 8 mm. long; cotyledons widely elliptic, 3.5 
mm. long. 
Distribution: Colombia, Panama. 
Additional specimens : 
Cotombpia: Departamento del Chocé, J. 4. Duke 11351, Hydro 
Camp No. 14, Rio Salaqui, 6 days upstream from Rio Siticio, alt. ca. 
200 m. 28 May 1967 (ECON). 
Panama: Province de Darién. N. Bristan 566, Cerro Pirre. 11 
Apr. 1967 (ECON, OSU). Bristan 569, same locality and date 
(ECON, OSU). 
A very distinct species, Brunfelsia chocoensis has been 
named for the general geographic province in which it 
occurs. It is known from the northernmost part of the 
Choco region of Colombia, an area bounded by the 
Serrania de Baudo in the west and the Serrania de Abibe 
in the east in the low lying basin of the Rio Atrato. Its 
range extends north to Cerro Pirre across the Panaman- 
ian border. Although additional collecting may reveal 
a larger area for the species, B. chocoensis appears to be 
endemic at this low elevation in swampy forest. In 1945, 
it was reported as a common species at Chigorodo, the 
type locality. I failed to find the plant in a recent col- 
lecting trip to this locality, primarily because of the 
large scale destruction of the forests for agriculture and 
pasturage. 
Brunfelsia chocoensis is most closely related to B. 
guianensis of the Guianas and northern Brazil. It differs 
in having much larger leaves, longer pedicels, and broader 
corolla lobes. B. chocoensis also resembles B. macrocarpa, 
a new species (described below) from the Pacific coast 
of northern Ecuador and Gorgona Island. 2B. chocoensis 
may be readily distinguished by its much smaller flowers 
and smaller fruits which lack the large, accrescent calyx 
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