PAPPUS VARIATION IN NORTH AMERICAN ASTERS. I. DOUBLE, TRIPLE AND QUADRUPLE PAPPUS IN SYMPHYOTRICHUM AND RELATED ASTER GENERA (ASTERACEAE: ASTEREAE)

John C Semple
Jennifer L A Hood

Published in Sida, Contributions To Botany, in 2005, in volume 21, issue 4, pages 2141-2159

Date published:2005

BHL: 9312391
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