The user interface is primitive. More about this . The checklist has 30,000 entries, i.e., a complete list, whereas the Flora itself is considerably smaller in scope but provides more descriptive material. Names Taxonomy A source for verification of plant names, as of January 2000 including 200,000 vascular plants with extensions planned. More about this .
Economic plants are a priority but there is much more.
Amazing slew of bureaucratic acronyms. More about this . Shame it's not Intermountain Flora itself. International Plant Name Index RBG Kew, Harvard University Herbaria, and the Australian National Herbarium. Valid Names Taxonomy Valid names from three institutions.