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North American thlaspis (Cruciferae) are often mentioned as being similar to Eurasian and South American thlaspis, but taxonomists have differed widely in interpreting their relationships. This volume reports the results of studies to ascertain whether there are discontinuities meriting the recognition of separate taxa in Thlaspi in North America, South American, and Eurasia. / The Dominican Republic was the first collecting ground for botanists in America. The author of Novitates Antillanae. IV reports on hitherto undescribed species and new records for the Dominican Republic, based on 15 months in the field, including from areas not reached by earlier plant explorers.
Dr. Patricia Holmgren directed the Steere Herbarium for more than 32 years, during which time she also served as Assistant Vice President for Science for 10 years and Associate Vice President for Collections and Publications for two years. She coordinated and edited Index Herbariorum for 30 years, in both its written and electronic forms. Dr. Holmgren also serves as co-director, editor, and author of the Intermountain Flora project with Dr. Noel Holmgren. Dr. Holmgren has held leadership positions in Association of Systematics Collections, International Association for Plant Taxonomy, and International Organization for Plant Information. She has served as President of the American Society of Plant Taxonomists and of the Botanical Society of America. She has received the Merit Award and the Centennial Medal from the Botanical Society of America, the Annual Service Award from the Association of Systematics collections, the Distinguished Service Award of The New York Botanical Garden, and, jointly with Noel Holmgren, the Asa Gray Award from the American Society of Plant Taxonomists and the Gold Medal Award from The New York Botanical Garden. She and Noel were honored in 2013 with a Festschrift, Harmony and Grit: Papers Celebrating the Completion of Intermountain Flora. In 2013, Thomas and Anne Hubbard endowed and named the position of Director of the William and Lynda Steere Herbarium in Pat's honor. Dr. Holmgren earned her undergraduate degree from Indiana University and her Ph.D. from the University of Washington. Patricia Holmgren's Author Page
Henri Alain Liogier, also known as Brother Alain (January 31, 1916 - November 9, 2009) was a French botanist, educator, and member of the clergy based out of Texas, United States. Liogier is responsible for over 100 scientific journal articles and over 30 books devoted to the study of botany.. He published the quintessential work on the flora of Cuba, Hispaniola and Puerto Rico, and these works are the foundation of botanical science for the Caribbean. During his life's work, he discovered over 300 species of plants all of which can be found at the New York Botanical Garden where he also served as a research associate. He was a founding member of the Academy of Science and first scientific director of the National Botanical Garden in the Dominican Republic. Dr. Liogier was recipient of the John Simon Guggenheim Fellowship for Studies in Plant Science. He was also the director of the Botanic Garden at the University of Puerto Rico. Henri Alain Liogier's Author Page