@book{bhlpg33502434, title = {An enumeration of Philippine flowering plants }, volume = {v.3}, url = {https://www.biodiversitylibrary.org/page/33502434}, publisher = {Bureau of Printing}, author = {Merrill, Elmer D. (Elmer Drew), 1876 -1956}, year = {1922}, pages = {Page 18}, } @book{bhlpg51394935, title = {The Philippine journal of science }, volume = {v.9:sect.C (1914) [Botany]}, url = {https://www.biodiversitylibrary.org/page/51394935}, publisher = {Bureau of Science}, author = {Philippines. National Science Development Board. }, year = {1914}, pages = {Page 373}, }