Apocynaceae GH: 02115647 Forsteronia peninsularis Woodson Guatemala: Petén Macanche, bordering the lake, SE, E of the i... E. Contreras 5873 1966-5-27
GH: 02383319 Rauvolfia tetraphylla Linnaeus Guatemala: Petén Lake Peten Itza, Santa Elena, on the airport... E. Contreras 5740 1966-5-12
Asclepiadaceae GH: 00518754 Matelea micrantha L. O. Williams Guatemala: Petén at Macanché E. Contreras 5417 1966-1-28
Orchidaceae GH: 02154414 Brassavola appendiculata A. Richard & Galeotti Guatemala: Petén Macanche, on the island E. Contreras 5868 1966-5-27
Piperaceae GH: 01979300 Piper amalago Linnaeus Guatemala: Petén Macanche, bordering the lake 2 km. east of v... E. Contreras 5803 1966-5-19
GH: 01980347 Piper marginatum Jacquin Guatemala: Petén Macanche, in botanal E. Contreras 5849 1966-5-23
GH: 01980456 Piper neesianum C. de Candolle Guatemala: Petén Lake Peten Itza, Santa Elena, on El Jobo E. Contreras 5763 1966-5-14
GH: 01980457 Piper neesianum C. de Candolle Guatemala: Petén Macanche, in ramonal, 1.4 km. east of villag... E. Contreras 5828 1966-5-21
GH: 01980458 Piper neesianum C. de Candolle Guatemala: Petén Macanche, in ramonal E. Contreras 5840 1966-5-22
GH: 01980459 Piper neesianum C. de Candolle Guatemala: Petén bordering Melchor de Mencos Road, km. 32 E. Contreras 5863 1966-5-24
GH: 01965004 Piper uhdei C. de Candolle Guatemala: Petén Macanche E. Contreras 5841 1966-5-22
GH: 01965164 Piper yucatanense C. de Candolle Guatemala: Petén Macanche, between the lake and large milpa E. Contreras 5807 1966-5-20
