CONTRIBUCION AL ESTUDIO FLORISTICO DEL VALLE DE MEXICO Estudio Cualitativo de las Sinecias que habitan los Cerros del Norte del Valle de México.

Resumen

The present paper contains a study of the flora of the hills in the N. of the Valley of Mexico. In it are indicated the principal associations that can be observed during the months of June to August. It is also shown that these associations, according to their characters, form a "spot" in the general flora of the Valley of Mexico, because many of their species are typical of the northern regions of the country.