Antigonon Endl. (5 images; © 2014 Jan Thomas Johansson)

Atraphaxis L. (21 images; © 2014 Jan Thomas Johansson)

Bistorta (L.) Mill. (50 images; © 2014 Jan Thomas Johansson)

Chorizanthe R.Br. ex Benth. (23 images; © 2014 Jan Thomas Johansson)

Coccoloba L. (4 images; © 2014 Jan Thomas Johansson)

Eriogonum Michx. (97 images; © 2014 Jan Thomas Johansson)

Fagopyrum Tourn. ex Haller (18 images; © 2014 Jan Thomas Johansson)

Fallopia Adans. (38 images; © 2014 Jan Thomas Johansson)

Koenigia L. (52 images; © 2014 Jan Thomas Johansson)

Muehlenbeckia Meisn. (31 images; © 2014 Jan Thomas Johansson)

Oxyria Hill (9 images; © 2014 Jan Thomas Johansson)

Persicaria Neck. (57 images; © 2014 Jan Thomas Johansson)

Polygonum L. (69 images; © 2014 Jan Thomas Johansson)

Pterostegia Fisch. & C.A.Mey. (6 images; © 2014 Jan Thomas Johansson)

Rheum L. (34 images; © 2014 Jan Thomas Johansson)

Rumex L. (247 images; © 2014 Jan Thomas Johansson)