The Classification Within the Juglandaceae

Abstract

A full description is presented of the Jn^landaceae and of the two subfamilies (Platycaryoideae, Juglandoideac), three tribes of the Juglandoideae (Juglandeae, Engelhardicae, Ilieorieae), seven genera, with their sul)genera and seetions.Figures and tables are given to illustrate the evolution of the genera, the comparative classifications within the family, and the comparative hiterpretations of the parts of the floral envelopes.Diagrams are presented of the position of the carpels, the orientation and type of the stigmas, and the parts of the floral envelopes.A list is gi\'en of the 59 species, with the subspecies and varieties of each, including their distribution.TIlis article on tlie Jnglanclaceae of tlic world brings togetlicr full descriptions of morphological features of the family, suhfaniilies, tribes, genera, subgenera, and sections, as well as a hst of species.Published descriptions are scattered tln'ough the literature.Many of the family and generic descriptions are found in regional taxonoinic treatments, primarily for nuMubers native to the United States, and hence are incomplete, such as Sargent (1933), Rehder (1940), Fernald (1950), and Gleason (1952); few descriptions are given of lesser categories between the ranks of family and genera and genera and species.Modern descriptions of the family applicable to world-wide members are available in works such as Koidzumi (1937), Manning (1952, 1970, 1974), Melcliior (1964), Hutchinson (1959, 1967), Elias (1972), and a few others.Engler (1889), Koidzumi (1937), and Melchior (1964) give descriptions of genera, but only Hutchinson (1967) presents rather full descriptions of all (8) modern genera.Sonic descriptions contain scattered inaccuracies; most do not include all of the variations which occin* in the taxa.