Is the plant Decumaria a genus of more species than the plant Pachycereus?
Decumaria: Decumaria, the woodvamps, is a genus of two species of flowering plants in the family Hydrangeaceae, one ("D. barbara") native to the southeastern United States, and the other ("D. sinensis") native to central China. Pachycereus: Pachycereus is a genus of 9–12 species of large cacti native to Mexico and just into southern Arizona, United States.
i don't know