Six different plants are represented in the attached photographs; the first two are the same plant. Hopefully, the last two aren't too vague. All were found in the central Florida.
#3 looks like Cassia fasciculata, Fabaceae Look for an interesting small stalked gland at the base of each petiole. I don't know what the function of it is.
#5 looks like a Heterotheca sp. H. latifolia, which has the odor of camphor, is common around here, but I don't know about where you are. Some of them are called Golden Asters. H. pilosa is also common in this area, which has pilose hairs, elongate leaves, and doesn't have the odor of camphor.
I agree with Cassia fasciculata and Heterotheca latifolia (also called Heterotheca subaxillaris) as being the likely plants; I'm still checking the genus Chloris. The course web site for Native Plants of Central Texas at the University of Texas at Austin has nice photography of some of the plants you identified for me.
Thanks for the link. I see that they don't use Manual of the Vascular Plants of Texas, which has been the "bible" for plants of Texas and neighboring states. My copy is almost falling apart with use. It was written by Correll and Johnston of the University of Texas, but hasn't been updated in years. Lloyd Shinners was at SMU. I don't know if he is still there or not. I have his old manual from 1958, which is duct taped together. Looks like I'll have to buy his new one.
