It is owing to the neglect of British planters and the consequent irregularity of the home timber trade that this fine timber has been ousted from its former pre-eminence by imports of other kinds. In writing of the common lime, I have used the scientific name, _Tilia europæa_ as conferred on it by Linnæus, rather than the more recent title of _T. vulgaris_. There seems a special reason for retaining the old name, inasmuch as Linnæus considered his own family name was derived from the linden tree. [Illustration: ENGLISH ELM (_Ulmus campestris_)] The Elms It is a matter of doubtful argument how many species go to compose the genus Elm--_Ulmus_--owing to the uncertainty of distinguishing true permanent species from varieties and natural hybrids. Foremost botanists have differed widely on the question; for whereas Bentham and Hooker recognised in 1887 only two true species growing naturally in the United Kingdom, Elwes and Henry describe five native species, besides nine varieties of the wych elm, as many of the English elm, and no fewer than thirteen varieties of _Ulmus nitens_, a species hitherto classed as a form of the English elm. The distribution of the elm family is somewhat peculiar, extending all the way from Japan, through Northern China and Europe to North America, but not crossing to the Western States; nor is any species to be found south of the temperate zone, except in the mountain ranges of Southern Mexico. Of all the cities of the New World, Boston reminds the British traveller more vividly of home scenes than any other, by reason of the massive English elms which enrich the landscape. Pity it is that we cannot return the compliment by planting the beautiful white elm (_Ulmus Americana_), the glory of Washington city, for it does not take kindly to our island climate.