A synopsis of Harperocallis (Tofieldiaceae, Alismatales) with ten new combinations Author Campbell, Lisa M. The New York Botanical Garden, Bronx, New York 10458, USA Author Dorr, Laurence J. Department of Botany, National Museum of Natural History, MRC- 166, Smithsonian Institution, P. O. Box 37012, Washington, D. C. 20013 - 7012, USA text PhytoKeys 2013 2013-05-09 21 37 52 http://dx.doi.org/10.3897/phytokeys.21.4859 journal article http://dx.doi.org/10.3897/phytokeys.21.4859 1314-2003-21-37 FFF5FFC2FF8DFFAE1E44FFD958777B6C 576162 Harperocallis duidae (Steyerm.) L.M. Campb. & Dorr comb. nov. Tofieldia duidae Steyerm., Fieldiana, Bot. 28 (1): 156. 1951. Type: Venezuela. Amazonas:stream bank above Vegas Falls, Brocchinia Hills, summit of Cerro Duida, 1700-1980 m, 1 Sep 1944, J.A. Steyermark 58176 (holotype: F [F0046065F!]; isotypes: MO!, NY!, US!, VEN). Isidrogalvia duidae (Steyerm.) Cruden, Syst. Bot. 16 (2): 278. 1991. Type: Based on Tofieldia duidae Steyerm. Type. Based on Tofieldia duidae Steyerm. Distribution ( Fig. 1 ). Endemic to the Guayana Highlands of Venezuela (Amazonas and Bolivar states) where it is known only from two tepuis (Cerros Duida and Jaua ); 1000-2100 m. Figure 1. Distribution of Harperocallis . Representative specimens. VENEZUELA . Amazonas: Mpio. Atabapo, Parque Nacional Duida-Marahuaka, Macizo del Duida, 2100 m, Apr 1991, A. Fernandez et al. 8094 (US); Cerro Duida, rio Cunucunuma, 1000-1100 m, 18 Nov 1950, B. Maguire et al. 29515 (NY); along upper Cano Culebra, 1500-1600 m, 21 Nov 1950, B. Maguire et al. 29616 (NY, US). Bolivar : Meseta de Jaua , Cerro Jaua , cumbre de la porcion Central-Occidental de la Meseta, 1922-2100 m, 22-27 Mar 1967, J.A. Steyermark 97899 (NY).