Will you be attending the Latin American Botanical Congress in Quito, Ecuador? Would you like to learn more about nomenclature? If so please consider signing up for the botanical nomenclature course that is being offered by IAPT. The course occurs on 19-20 October. The cost is $25, which includes a copy of the print version of the new Spanish translation of the 2018 International Code of Nomenclature for algae, fungi, and plants (Shenzhen Code). The instructors get no better

by Thomas Borsch, Hilda Flores-Olvera, Silvia Zumaya Mendoza, Kai Müller Iresine is a neotropical genus of the Amaranthaceae with most of the species diversity in Mexico and Mesoamerica. It has suffered a complex classification history with considerably diverging views on the genus concept. We have carried out a phylogenetic analysis of Iresine and allied genera using sequence data of combined plastid introns (including the matK CDS) and spacers as well as ITS, and a dense

by Nicolas Magain, Camille Truong, Trevor Goward, Dongling Niu, Bernard Goffinet, Emmanuel Serusiaux, Orvo Vitikainen, Francois Lutzoni, Jolanta Miadlikowska This comprehensive phylogenetic revision of sections Peltigera and Retifoveatae of the cyanolichen genus Peltigera is based on DNA sequences from more than 500 specimens from five continents. We amplified five loci (nrITS, β-tubulin and three intergenic spacers part of colinear orthologous regions [COR]) for the mycobi

by Domingos Cardoso, Daiane Trabuco Cruz, Álvaro Idárraga, Karina Banda, Álvaro Cogollo, Cássio van den Berg, Luciano Paganucci Queiroz, Toby Pennington, Matt Lavin Ecology, geography, morphology, and a combined phylogenetic analysis of DNA sequence variation support the recognition of the new species Luetzelburgia jacana (Leguminosae, Papilionoideae, vataireoid clade). This species is found in the inter-Andean Rio Cauca Valley in Colombia. Phylogenetic analyses of nine pla

by Michelle J. Price, Leonard Thomas Ellis The name Andreaea alpina Hedw. was validly published in Hedwig's 1801 work Species muscorum frondosorum, but the entity itself can be traced back in the pre-Linnaean literature to Dillenius of 1741 where it was described under "Lichenastrum." Three herbarium sheets in the Hedwig-Schwägrichen herbarium in G are associated with A. alpina: one that was identified as A. rupestris Hedw. (G00056451), one as A. obovata Thed. (G00056454),

by Geadelande Delgado, George Staples, Maria Teresa Buril Dichondra is a genus of creeping and sprawling herbs with reniform leaves, entire leaf margins and inconspicuous flowers. It is included in the tribe Dichondreae (Convolvulaceae). Dichondra is a taxonomically complex genus with multiple unsolved nomenclatural problems. We propose lectotypes for Dichondra argentea, D. parvifolia, D. macrocalyx and D. sericea and a neotype for Demidofia repens, the basionym of Dichondr

by Angelo Troia, Germinal Rouhan To stabilize the application of some names in the genus Isoetes in the Mediterranean biodiversity hotspot, we studied herbarium specimens and imaged spores with scanning electron microscopy, with special reference to those taxa in the I. longissima Bory and I. histrix Bory groups that were described from France, Algeria and Turkey, and are in need of a taxonomic revision. The following names are lectotypified: I. adspersa A.Braun, I. boryana

by John Richard Ironside Wood, Serena Marner, Robert Scotland, Stephen Harris Dillenius's Hortus Elthamensis was published in 1732. In most versions the plates are uncoloured, but a few surviving coloured versions are known. The plates are of considerable historical and scientific importance as many Linnaean types are founded on these illustrations. The specimens on which the plates were based are still housed in the Oxford University Herbaria (OXF) and examples from Convol

by Pablo Ferrer Gallego The nomenclatural types of the Linnaean names in the genus Zygophyllum (Zygophyllaceae) are discussed and revised. Lectotypes of Z. fulvum (≡ Roepera fulva), Z. morgsana (≡ R. morgsana), Z. sessilifolium (≡ R. sessilifolia) and Z. spinosum (≡ R. spinosa) are designated, and Z. simplex (≡ Tetraena simplex) is neotypified. Epitypes are designated for Z. coccineum and Z. spinosum due to ambiguity in the interpretation of their types. Linnaeus's original m

by Christopher D Tyrrell, Ximena Londoño, Ramona Oviedo Prieto, Lakshmi Attigala, Katelyn McDonald, Lynn G Clark Arthrostylidium, a Neotropical genus of 31 mostly clambering woody bamboo species, is a member of subtribe Arthrostylidiinae, which is closely allied to subtribe Guaduinae. Arthrostylidium has long been a catchall for species within its subtribe that display unusual morphology. While attempting to clarify the circumscription of Arthrostylidium, we discovered thre