Jepson eFlora
Key to families | Table of families and genera

Key to Lythrum

View taxon page for Lythrum

1. Hypanthium broadly bell-shaped, 1–2 mm, ribs conspicuous or not; stem extensively creeping or decumbent, rooting at nodes ..... L. portula

1' Hypanthium cylindric, 4–7 mm, ribs conspicuous; stem prostrate or ascending to erect, rooting at base

2. Flowers > 2 per axil, in dense, ± sessile cymes, not on short axillary shoots ..... L. salicaria

2' Flowers 1–2 per axil, on short axillary shoots or not

3. Stem erect, branches many, above; epicalyx lobes < to > sepals, horn-like; perennial herb ..... L. californicum

3' Stem decumbent to ascending or erect, branches at base, generally 0–few above; epicalyx lobes >> to = sepals; annual or short-lived perennial herb

4. Flowers 1 per axil, not on short axillary shoots; hypanthium 4–5 × longer than wide; epicalyx lobes ± 2 × > sepals ..... L. hyssopifolia

4' Flowers 1 per axil on main shoots and on short axillary shoots; hypanthium 8–10 × longer than wide; epicalyx lobes ± = sepals ..... L. tribracteatum

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Citation for the whole project: Jepson Flora Project (eds.) [year] Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html [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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