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The genus Castilleja is a highly specialized member of the subfamily Rhinanthoideae of the family Scrophulariaceae. The wildflower enthusiast recognizes many of the species as Indian paintbrushes. The name alludes to the resemblance of the inflorescence of closely appressed flowers and bracts to a freshly dipped paint brush. The Castilleja viscidula group is a relatively natural assemblage, consisting of nine species and centering in the western United States. The species are easily recognized by their wavy-margined leaves and glandular pubescence. This treatment of the Castilleja viscidula group includes keys, descriptions, black and white illustrations, and distribution maps.
Dr. Noel Holmgren has been associated with The New York Botanical Garden for over 50 years, first as a graduate student, then as Curator, and now Senior Curator Emeritus. He has been a major author of Intermountain Flora since its inception in the late 1960s, assuming overall direction of the project following Arthur Cronquist's death in 1992. In addition, he has published treatments in the family Scrophulariaceae for the many geographical areas. Active fieldwork for the past 54 years has yielded 16,577 collections, including 73 new to science. He and Bobbi Angell co-authored Botanical Illustration: Preparation for Publication, and he was principal editor of Illustrated Companion to Gleason and Cronquist's Manual: Illustrations of the Vascular Plants of Northeastern United States and Adjacent Canada. He was Editor-in-Chief of Brittonia for 14 years and Chairman of the Garden's Scientific Publications Committee from 1977 to 1992. He was President of the Torrey Botanical Club, co-Vice President of the American Penstemon Society, and on the Council of the American Society of Plant Taxonomists. He was one of the editors of the fifth edition of CBE Style Manual, his written contribution on style conventions in the plant sciences. He has received the Distinguished Service Award from The New York Botanical Garden; Edgar T. Wherry Award from the North American Rock Garden Society; Professional and Scholarly Publishing Division of the Association of American Publishers for 1998's best book in the biological sciences, Illustrated Companion to Gleason and Cronquist's Manual; Myrtle Hebert Award from the American Penstemon Society; and jointly with Patricia Holmgren, the Asa Gray Award from the American Society of Plant Taxonomists and the Gold Medal Award from The New York Botanical Garden. Noel and Pat were honored in 2013 with a Festschrift, Harmony and Grit: Papers Celebrating the Completion of Intermountain Flora. Noel received his Noel Holmgren's Author Page