Persicaria hydropiper (L.) Spach

Jarvis, Charlie, 2007, Chapter 7: Linnaean Plant Names and their Types (part P), Order out of Chaos. Linnaean Plant Types and their Types, London: Linnaean Society of London in association with the Natural History Museum, pp. 718-782 : 757

Polygonum hydropiper Linnaeus , Species Plantarum 1: 361. 1753 .

"Habitat in Europae subhumidis." RCN: 2859.

Lectotype (Bhopal & Chaudhri in Pakistan Syst. 1(2): 76. 1977): Herb. Linn. No. 510.9 ( LINN) .

Current name: Persicaria hydropiper (L.) Spach ( Polygonaceae ).

Note: Ekman & Knutsson (in Nordic J. Bot. 14: 24. 1994) assessed the identities of the original material for this name and designated Herb. Clifford: 42, Persicaria 4 ( BM) as lectotype, a choice that maintained the traditional usage of the name. They noted that 510.9 (LINN), part of the original material, was identifiable as Persicaria minor (Huds.) Opiz , but were unaware that Bhopal & Chaudhri had already designated this collection as the type. If this identification is confirmed, P. hydropiper would seem likely to be a candidate for conservation.