The Taxonomic Use of Specialization of Vessels in the Metaxylem of Gramineae, Cyperaceae, Juncaceae, and Restionaceae

in TABLE 1.The families are named as described by Hutchinson (1934).Where possible, Hitchcock (1951) was followed for generic names in the Gramineae and Fernald (1950) for genera in the Cyperaceae and Juncaceae.Hutchinson (1934) was followed for all other generic titles.Data from 53 species in 40 genera of the Liliaceae as understood by Hutchinson (1934) were used in establishing the place of the Liliaceae in text-figures 1-3.