Monographs Details: Costus juruanus K.Schum. var. juruanus
Maas, Paulus J. M. 1972. Costoideae (Zingiberaceae). Fl. Neotrop. Monogr. 8: 1-140. (Published by NYBG Press
Synonyms:Costus juruanus K.Schum.
Description:Description - Sheaths and ligule sparsely to densely puberulous. Leaves glabrous on both sides or sparsely puberulous towards the margin; costa beneath rather densely villose to hirsute at the base, sparsely puberulo-sericeous towards the apex.
Discussion:Cuatrecasas 12865 (US) from Sarare River Region between El Amparo and La Mesa, Cordillera Oriental, Norte de Santander, Colombia, collected between 1400 and 1700 m would run to this species in the key because of its extremely long ligule (to 50 mm long!). The inflorescence, however, agrees entirely with that of C. lima. The specimen might represent a new variety of C. lima, but it is also possible that it belongs to C. lima var scabremarginatus with some introgression of C. juruanus. This problem can only be solved after studying fresh material, including flowers.
Distribution:Brazil South America
| Acre Brazil South America
| Peru South America
| Junín Peru South America
| San Martín Peru South America