Monograph of the Neotropical Species of Asplenium Sect. Hymenasplenium (Aspleniaceae)Published in Annals of the Missouri Botanical Garden, in 1993, in volume 80, pages 1-38A Revision of the Genus Pleurothyrium (Lauraceae)Published in Annals of the Missouri Botanical Garden, in 1993, in volume 80, pages 39-118
A Revision of the Genus Pleurothyrium (Lauraceae)Published in Annals of the Missouri Botanical Garden, in 1993, in volume 80, pages 39-118