No access restrictions. Many of SIA's holdings are located off-site, and advance notice is recommended to consult a collection. Please email the SIA Reference Team at osiaref@si.edu
Eyde, Richard H. and Barghoorn, Elso S. 1963. Morphological and paleobotanical studies of the Nyssaceae, II. The fossil record. Journal of the Arnold Arboretum, 44(3): 328-376.
Eyde, Richard H. 1977. Reproductive Structures and Evolution in Ludwigia (Onagraceae). I. Androecium Placentation, Merism. Annals of the Missouri Botanical Garden, 64: 644-655.
Eyde, Richard H. 1985. Expedition Botany, the Making of New Profession. In: Viola, H. J. and Margolis, C., Magnificent Voyagers: the U.S. Exploring Expedition, 1838-42. Washington: Smithsonian Institution Press,() pp.25-41.
Eyde, Richard H. 1981. Reproductive Structures and Evolution in Ludwigia (Onagraceae). III. Vasculature, Nectaries, Conclusions. Annals of the Missouri Botanical Garden, 68(3): 470-503.