Aaron, The book "Plants for Beekeeping in Canada and the northern USA..." by Jane Ramsay contains many more plant species and cultivars, as well as more specific information about each (sugar concentration in nectar, protein content of pollen) than McGregor's book, despite that it only deals with plants in the north. One could conclude that McGregor only dealt with the plants that were of interest to him, or simply that his book deals with nectar/pollen plants in a superficial way (like most plant books - not just nectar/pollen books), and that he only wrote about the obvious &/or well known food sources. Truth is, the only nectar/pollen book I've found to be accurate and (mostly) all inclusive ('course I live in the north) is the Ramsay book and it's out of print, not likely to be re-printed. I hope you get a chance one day to get a copy. Kathy Aaron Morris wrote: > my question was about plants not included in McGregor. > Specifically, > > Can I assume if (plants) didn't make > > McGregor's book the plants aren't of interest to honeybees or should I > > assume the plants weren't of interest to McGregor?