Johannes Paulus Lotsy

Dennstaedtiaceae is one of fifteen families in the order Polypodiales, the most derived families within monilophytes (ferns). It comprises 10 genera with ca 240 known species, including one of the world's most abundant ferns, Pteridium aquilinum (bracken). Members of the order generally have large, highly divided leaves and have either small, round intramarginal sori with cup-shaped indusia (e.g. Dennstaedtia) or linear marginal sori with a false indusium formed from the reflexed leaf margin (e.g. Pteridium). The morphological diversity among members of the order has confused past taxonomy,

Euphorbia leucocephala, with many common names including little Christmas flower, white lace euphorbia, snow bush, snow flake, snows of Kilimanjaro and white Christmas bush is a species of plant in the family Euphorbiaceae. It is endemic to Mexico and Mesoamerica, and a relative of the poinsettia. Its clear sap is an irritant that can cause blisters and skin rashes. Ingesting it can cause vomiting and diarrhea.

Croton guatemalensis, known as copalchi, is a plant species of the genus Croton. It is found from Mexico to Central America. It is also known as 'cascarilla,' the bark of which may be an ingredient in Angostura bitters.

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