Publication: Nat. Arr. Brit. Pl. 2: 269. 1821.

Origin: Introduced from Eurasia

Herbarium search: CPNWH

Notes: FNA5: "An allozyme study by L. L. Consaul et al. (1991) provided evidence of the allotetraploid origin of Persicaria maculosa, with P. lapathifolium as one of the parents. Plants with stems spreading-hairy and peduncles stipitate-glandular have been named P. maculosa subsp. hirsuticaulis (Danser) S. Ekman & Knutsson. Material referable to this subspecies has not been seen among North American specimens. Hybrids between P. maculosa and P. minor have been documented in Europe (R. H. Roberts 1977)."

Last updated 2/12/2024 by David Giblin.