I am indebted to my friend Professor Sereno Watson, of Harvard, for the identification of species, which to the number of sixty he has already determined from some five hundred that he collected in the Departments of Livingston and Izabal. I did not myself make any collection, but noted the genera that were familiar to me as I travelled through the country. So little has been published about the Guatemaltecan Flora that I have ventured to add these notes to Professor Watson’s list. Clematis americana, Will. Near Izabal. dioica, L. Panajachel. caripensis, HBK. Sacapulas, Jutiapa. polycephala, Bert. V. de Agua. sericea, HBK. San José. Davilla rugosa, Poir. Banks of Rio Dulce, Rio Chocon. lucida, Presl? Chocon. Doliocarpus pubens, Mart. Livingston. Curatella americana, L. Dry hills near Quirigua. Tetracera n. sp. Rio Chocon. Guatteria Jurgensenii, Hemsl. Shores of Lago de Izabal, Chocon. n. sp. Anona squamosa, L. Livingston, muricata, L. Cunen, Uspantán. Anona Cherimolia, Mill. Common. palustris, L. Sea-shore near Livingston. Xylopia frutescens, Aubl., var. glabra. Shores of Lago de Izabal. Cissampelus Pareira, L. Izabal, Rio Dulce. tropæolifolia, DC.? Izabal. Nymphaea ampla, DC. Rio Polochic, mouth of Rio Chocon. Argemone mexicana, L. Draba vulcanica, Benth. V. de Agua. Cleome polygama, L. San Felipe. Moringa pterygosperma, Gaertu. Zacapa, Chiquimula. Bixa Orellana, L. Xylosma nitida, A. G. Alsodeia guatemalensis, Watson. Rio Chocon. Oncoba laurina, Oliver. Izabal, Rio Chocon. Casearia Brighami, Watson. Chocon. Polygala asperuloides, HBK. Izabal. Jatropha Curcas, L. Janipha Manihot, HBK. Croton. (Several sp. on coast, not determined.) Euphorbia Poinsettii. Uplands. Hura crepitans, L. Sacapulas, Zacapa. Two euphorbiaceous trees in eastern highlands. Drymaria cordata, Willd. Lago de Izabal. Quercus (2 sp.). Cunen to Quiché. Portulaca oleracea, L. Livingston, Chocon. Phytolacca icosandra, L. Antigua, Santa Cruz del Quiché. Amaranthus paniculatus, L. Cunen, Jutiapa. Sida rhombifolia, L. Chocon. Abutilon. (Trees at La Tinta. Several allied sp. banks of Rio Chocon.) Hibiscus Abelmoschus, L. Izabal. Gossypium barbadense, L. Livingston. Hampea (?) stipitata, Watson. Large tree, Chocon. Paritium tiliaceum, A. Juss. Shore near Santo Tomas. Pavonia racemosa, Swartz. Rio Dulce. Eriodendron ceiba. Sacapulas, Chocon, Quirigua. Bernoullia flammea, Oliv. Istapa. Cheirostemon platanoides, Hum. & Bon. V. de Fuego, Encuentros. Helicteres guazumæfolia, HBK. Cerro del Mico. Pachira macrocarpa. Rio Chocon, Motagua. insignis, Sav. Red petals at Omoa. sp. Chocon. Theobroma cacao, L. Chocon, Quirigua, Pansos. Guazuma tomentosa, HBK. Chocon. Gouania tomentosa, Jacq. Gomphia (Ouratea) guatemalensis, Engler. Chocon.