72/236 and XXIII.)) of our Northern States plants to Trubner & Co., 12, Paternoster Row, to be thence posted to you. It may have been delayed or failed, so I post another from here. Range of species in latitude must next be tabulated--disjoined species catalogued (i.e.those occurring in remote and entirely separated areas--e.g. Phryma, Monotropa uniflora, etc.)--then some of the curious questions you have suggested--the degree of consanguinity between the related species of our country and other countries, and the comparative range of species in large and small genera, etc., etc. Now, is it worth while to go on at this length of detail? |