1	"Ochreae with marginal bristles 10-15 mm long; lower sides of leaves and inflorescences without glands; tepals 5"	"Persicaria salicifolia"
1	"Ochreae without marginal bristles or the bristles less than 5 mm long; lower surface of leaves and inflorescences dotted with minute glands, these sometimes obscured by hairs; tepals 4 or 5"	2
2	"Tepals 4, about 3 mm long; ochreae up to 30 mm long, without marginal bristles"	"Persicaria senegalensis"
2	"Tepals 5, 2-3 mm long; ochreae up to 25 mm long, with or without without marginal bristles"	"Persicaria glabra"