Iresine latifolia (M.Martens & Galeotti) Hook.f

Thomas Borsch, Hilda Flores-Olvera, Silvia Zumaya & Kai Müller, 2018, Pollen characters and DNA sequence data converge on a monophyletic genus Iresine (Amaranthaceae, Caryophyllales) and help to elucidate its species diversity, Taxon 67 (5), pp. 944-976 : 968

Iresine latifolia (M.Martens & Galeotti) Hook.f .

in Bentham & Hooker, Gen. Pl. 3: 42. 1880 ≡ Gomphrena latifolia

M.Martens & Galeotti in Bull. Acad. Roy. Bruxelles 10(1): 349. 1843 ≡ Alternanthera latifolia (M.Martens & Galeotti) Moq. in Candolle, Prodr. 13(2): 351. 1849 – Lectotype (designated here): MEXICO. Cordillera (Oaxaca), Oct–Nov 1840, Galeotti 423 (BR barcode 000006952501! [image!]; isolectotype: BR barcode 000006953157! [image!]).

= Achyranthes calea Ibáñez in Naturaleza (Mexico City) 4: 79. 1879 ≡ Iresine calea (Ibáñez) Standl . in Contr. U.S. Natl. Herb 18(3): 94. 1916 – Type: MEXICO. Puebla: Izúcar de Matamoros, Oct 1874?, s.coll. s.n. (type not located).

= Iresine laxa S.Watson in Proc. Amer. Acad. Arts 21: 454. 1886 – Lectotype (designated here): MEXICO. Coahuila: Jimulco Mtns, 27 Apr 1885, C.G. Pringle 141 (GH barcode 00037105! [image!]; isolectotypes: A barcode 00037106! [image!], AC barcode 0 0 312956 [image!], BM No. 017388!, BR barcodes 000005098446! [image!] & 0 0 0 0 0 8430588 [image!], CORD barcodes CORD00002576 [image!] & CORD00002577 [image!], E barcode E00296904 [image!], F barcode V0093618F! [image!], GOET barcode GOET000088! [image!], JE barcode JE00026019 [image!], K barcode K000195149!, MO No. 3728002!, NY barcodes 0 0 324531 [image!] & 0 0 324532 [image!], PH barcode 0 0 0 16086 [image!], RSA barcode RSA0000621 [image!], US barcodes 00102829! & 00145911!, VT barcode UVMVT024388 [image!]).

= Iresine latifolia var. velutina Loes. in Repert. Spec. Nov. Regni Veg. 16: 203. 1919 – Type: MEXICO. Puebla: in den Steppenwäldern der Umgebung von Tehuacan und El Riego, El Riego, Endlich 1767 (male) y 1767a (female), (type not located).

Note. – No lectotypification of Iresine latifolia was made by Pedersen (1997), who also cited a wrong collector’s number (Galeotti 520) for the type. The two Galeotti specimens mentioned in the protologue are numbers 420 and 423. We have selected Galeotti 423, the sheet with barcode 0 0 0 0 0 6952501, which has the more complete label; the isolectotype could be a duplicate for which a simpler label was just written by hand. Standley (1916) erroneously made a new combination using Achyranthes calea Ibáñez as basionym, assuming that “ Iresine latifolia D. Dietr. ” was already available as a validly published name. However, as pointed out by Pedersen (1997) the name Iresine latifolia appears nowhere on p. 870 in Dietrich’s Synopsis plantarum (vol. 1, 1839), although this is cited by Moquin-Tandon (1849: 351). On the other hand, Moquin-Tandon mentiones two pages earlier (p. 349) “ Iresine latifolia = Alternanthera pulverulenta ”, which apparently is an error because Alternanthera latifolia is the next entry on p. 351 of Moquin’s treatment. No specimen of I. latifolia var. velutina could be localized at B. The existence of duplicates that could serve as lectotypes cannot be excluded as Endlich specimens are in various herbaria such as G, L and MO (electronic search so far not successful).

Taxonomic status: Probably a natural entity (monophylum) as currently defined (A).