Rubiaceae Psychotria tristis H.J.P.Winkl. - Peru J. G. Graham 6006 image_info.php?img=images/collections/jggraham_006006_01_p.jpg&id=82880#image82880 Rubiaceae Psychotria tristis H.J.P.Winkl. - Peru J. G. Graham 6006 image_info.php?img=images/collections/jggraham_006006_02_p.jpg&id=93536#image93536 Rubiaceae Psychotria tristis H.J.P.Winkl. - Peru V. Chama 4665 image_info.php?img=images/collections/vchama_004665_01_p.jpg&id=101185#image101185 Rubiaceae Psychotria tristis H.J.P.Winkl. - Peru V. Chama 4803 image_info.php?img=images/collections/vchama_004803_01_p.jpg&id=101291#image101291 Rubiaceae Psychotria tristis H.J.P.Winkl. - Peru J. Marcelo 2939 image_info.php?img=images/collections/jmarcelo_002939_01_p.jpg&id=128881#image128881