Taxonomic revision of the Chilean Puya species (Puyoideae, Bromeliaceae), with special notes on the Puya alpestris-Puya berteroniana species complex Georg ZizkaJulio V. SchneiderPatricio Novoa OriginalPaper 09 July 2013 Pages: 387 - 407
Mentzelia canyonensis (Loasaceae), a new species endemic to the Grand Canyon, Arizona, U.S.A. John J. SchenkWendy HodgsonLarry Hufford OriginalPaper 09 July 2013 Pages: 408 - 416
A taxonomic revision of Leucothoë (Ericaceae; Tribe Gaultherieae) Walter S. JuddNorman C. Melvin IIIKathleen A. Kron OriginalPaper 09 July 2013 Pages: 417 - 438
The genus Disciphania (Menispermaceae: Tinosporoideae, Tinosporeae) in Mexico Pablo Carrillo-ReyesEduardo Sahagún-GodínezGuillermo Ibarra-Manríquez OriginalPaper 09 July 2013 Pages: 439 - 451
Taxonomic identity and typification of selected names of North American Potamogetonaceae Zdenek KaplanJames L. Reveal OriginalPaper 09 July 2013 Pages: 452 - 468
Lepanthes variabilis (Orchidaceae: Pleurothallidinae), a new endemic species from Costa Rica Christina M. SmithDaniel JiménezFranco Pupulin OriginalPaper 13 August 2013 Pages: 469 - 476
Interxylary phloem: Diversity and functions Sherwin Carlquist OriginalPaper 09 July 2013 Pages: 477 - 495