Hierarchial Roots and Shoots or Opera Jehovae Magna! (PSALMS 111:2)

The philosophy of Linnaeus\u27s classification, Systema Naturae, is briefly reviewed, as well as those of post-Linnaean systems of plant classification. Texts of current codes of nomenclature pertaining to hierarchy, including associated rank terminations, are compared

The Genus Asclepias in Iowa

The present study was undertaken to provide modern distribution maps and a workable key for the Iowa milkweeds. The genus Asclepias has not been separately studied in Iowa, so far as\u27\u27 the authors can ascertain. In the most recent Iowa flora, Conard (1951) lists 16 species. In the present work 15 species are recognized. Appreciation is extended to Dr. Robert Thorne and Dr. Richard Pohl for the use of specimens from the herbaria of the State University of Iowa and Iowa State College. In addition, material from the herbarium of Grinnell College has been studied. In all, approximately 1200 sheets of Asclepias were examined

A History of Botanical Nomenclature

Volume: 78Start Page: 33End Page: 5

NOTES FOR THE FLORA OF DOMINICA: SPERMACOCE CONFUSA AND SCHRADERA EXOTICA (RUBIACEAE)

Volume: 58Start Page: 445End Page: 45