Amaranthus hybridus Linnaeus (1753: 990) Nomenclature survey of the genus Amaranthus (Amaranthaceae). 5. Moquin-Tandon’s names Iamonico, Duilio Phytotaxa 2016 2016-09-07 273 2 81 114   28.  Amaranthus paniculatusvar. longespicatus Moquin-Tandon (1849: 257) Type ( lectotypehere designated):— SWITZERLAND. Hort. Genev.,  September 1832, s. coll. s.n.(P04021939 [digital image!], image of the lectotypeat http://mediaphoto.mnhn.fr/media/1449489915961MhZHmmE3bvffTsPv).   =   Amaranthus hybridus Linnaeus (1753: 990).  Type ( lectotypedesignated by Townsend 1974: 19):— U.S.A. Habitat in Virginia, Herb. Linn. No. 1117.19(LINN [digital image!], image available at http://linnean-online.org/11645/).  Nomenclatural notes:—On the basis of at least one specimenat “herb. Genev.” (as reported in the protologue), Moquin-Tandon (1849: 257)described the var. longespicatus, which would be characterized by having the terminal florescence much longer than those referred to the other five varieties (see Moquin-Tandon 1849: 257), thin and interrupted (”spicâ terminali longissimâ gracili interruptâ...”). There is one specimenat P (barcode 04021939) bearing two pieces of a same plant, of which one is the terminal florescence (about 30 cmlong). The exsiccatum matches with the diagnosis as well as the data on the label, which also includes the collection date ( September 1832). I here designated this specimen as the lectotypeof the name  Amaranthus paniculatusvar. longespicatus.   Taxonomical notes:—Although Moquin-Tandon (1849: 257)described  Am. paniculatusin having ”...calyce bracteis subbreviores...”, an important character, which characterizes  Am. cruentus(see e.g., Mosyakin & Robertson 2003, Iamonico 2015and the synonymy), the lectotypehere designated for  Am. paniculatusvar. longespicatusshows bracts at least 1.5 times longer than the tepals. This characteristic refers to  Am. hybridusand I here propose to synonymyzed the Moquin-Tandon’s variety withthe Linnaean  Am. hybridus.