Jepson eFlora
Key to families | Table of families and genera

Key to Persicaria

View taxon page for Persicaria

Jepson Manual glossary definitions can be seen by moving your cursor over words underlined with dots.

1. Inflorescence ± head-like; petioles generally winged, ear-like lobes at base (sect. Cephalophilon) ..... P. capitata

1' Inflorescence spike- or panicle-like; petioles not winged, ear-like lobes 0

2. Inflorescence panicle-like; perianth rotate, parts fused < 1/5 (sect. Rubrivena) ..... P. wallichii

2' Inflorescence spike-like; perianth bell-shaped or ± so, parts fused > 1/3 (sect Persicaria)

3. Perianth gland-dotted

4. Perianth lobe margins ± red; fruit dull; leaves bitter-tasting ..... P. hydropiper

4' Perianth lobe margins generally white; fruit shiny; leaves not bitter-tasting ..... P. punctata

3' Perianth not gland-dotted

5. Perennial herb, generally rhizomed or stoloned

6. Inflorescence terminal, 1 or paired, 8–20 mm wide; styles 2; fruit lens-shaped ..... P. amphibia

6' Inflorescence axillary, terminal, 2 or more, 2–5 mm wide; styles 3; fruit 3-angled ..... P. hydropiperoides

5' Annual, rhizomes or stolons 0

7. Ocreae leaf-like distally ..... [P. orientalis]

7' Ocreae papery throughout

8. Peduncle glands 0; bristles 2–3.5(4.5) mm on ocrea margins ..... P. maculosa

8' Peduncle glands ± stalked; bristles 0 or < 1 mm on ocrea margins

9. Perianth lobes 4(5), outer with anchor-shaped veins; inflorescence generally ± nodding ..... P. lapathifolia

9' Perianth lobes 5, outer without anchor-shaped veins; inflorescence generally erect ..... P. pensylvanica


Citation for the whole project: Jepson Flora Project (eds.) [year] Jepson eFlora, [accessed on month, day, year]
Citation for an individual treatment: [Author of taxon treatment] [year]. [Taxon name] in Jepson Flora Project (eds.) Jepson eFlora, [URL for treatment]. Accessed on [month, day, year].
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