TY - JOUR
AU - 
AB - A SYSTEMATIC STUDY OF THE NORTH AMERICAN GENUS TRILLIUM, ITS VARIABILITY, AND ITS RELATION TO PARIS AND MEDEOLA R. R. GATES Formerly Research Assistant to the Missouri Botanical Garden Introduction" Trillium is a genus in which remarkable uniformity in general appearance and structure is combined with great variability in certain organs from species to species. This variability is of such a nature that it is often difficult to delimit the species accurately according to present knowledge. While the range of variation, in leaf characters, for example, is so slight in the genus that a single leaf can in nearly all cases be recognized at sight as belonging to Trillium, yet in many cases it would be quite impossible to determine with certainty the species. The present paper may therefore be regarded as a con- spectus of the North American species of Trillium  thirty-one of which, with nine varieties, are recognized  without an at- tempt to delimit in many cases the exact boundaries of indi- vidual species. This can only be done satisfactorily after further extensive field studies of the range of variation in a number of the species. Trillium is of particular interest from another point of 
TI - A Systematic Study of the North American Genus Trillium, Its Variability, and Its Relation to Paris and Medeola
JF - Annals of the Missouri Botanical Garden
DO - 10.2307/2990062
DA - 1917-02-01
UR - https://www.deepdyve.com/lp/unpaywall/a-systematic-study-of-the-north-american-genus-trillium-its-Fg3qH6JfMM
DP - DeepDyve
ER -