In some instances just knowing the phylum will provide useful results. Bryophyte and Cyanobacteria information can be located by searching at the phylum level. Using a drill down interface requires that one know something about the taxonomy of the plant. If you think you know the family that the plant belongs to, then you can turn to a number of different sources. This method of finding information is similar to the drill down interfaces covered above.
Web rings can be another way to get at useful information in a particular topic.
This site is useful as Florida has tropical plants, some of which are also found here. The plant listed above Delonix regia is Senna surattensis. If anyone has seen Senna surattensis on Pohnpei, please let Lee Ling know. The blossom imaged has an unusual number of petals. List the names of the eight rings found there that relate to botany.