Language: Spanish
Volume 19, part 2 includes 106 genera and 421 species in the following 15 families: Anacampserotaceae, Apocynaceae, Gentianaceae, Hydrangeaceae, Loasaceae, Montiaceae, Petiveriaceae, Phytolaccaceae, Plumbaginaceae, Polemoniaceae, Portulacaceae, Prirnulaceae, Talinaceae, Tamaricaceae, and Theaceae .