He makes several interesting observations on the red and the white cypress, the former of which he says is the more valuable for strength and durability, owing to its being impregnated with resin. He also observes that the "cypress knees," as they are commonly called, never reach a height greater than the high water mark. In combating the theory of Dupratz that the cypress is propagated from its root, Dunbar says that is "invariably propagated from the seed, which is about the size of a Spanish walnut," and that he has "often observed half a dozen or more young plants produced from one apple, which often coalesce into one and sometimes the greater part perish to make room for their more fortunate brethren." He says of one species of the white oak, that "nature has so ordained that the husk embraces the acorn so firmly that they are not separated by their fall from the tree, by which means this case by its comparatively small specific gravity buoys up the acorn, and being carried along by the various current of the inundation, serves to plant distant colonies of this species." He also gives an interesting account of the cotton tree, the willow and the bamboo cane, the last of which he attempts to classify botanically. He says of the cane: "It produces a very abundant crop of grain, and that only once, for it immediately after perishes, root and branch, it is not known how many years the reed requires to arrive at this state of maturity; if we were to suppose that 25 years were its limit, it must happen that a person who has resided during that length of time in this country and who has visited many parts of it must have seen all the cane that came under his inspection once in grain, and upon the average one twenty-fifth part of all the cane in a large tract of country ought annually to yield a crop, but this is by no means the case, for I who have lived during that length of time in this country and have frequently traversed many extensive tracts of it, have never in any one year seen 1-500 part of the canes in seed of those parts that I have intimately known." He therefore concludes that it must require at least five hundred years for this plant to reach "a state of maturity to enable it to bear a crop of seed." His description of the ornamental trees of this region is graphic and interesting. No one can read his account of the magnolia tree without being deeply impressed with the fact that he appreciated its beauty. In studying the properties of the poplar, he made a hydrometer of a thin, broad piece of plank of this material, cut across the grain. He "improved its sensibility by boiling it when very dry, in a solution of mild alkali or carbonated potash." He describes many other trees, among which are the dogwood, the redbud, the wild cherry, the horse chestnut and the sweet gum.