Lythrum paradoxum Koehne

Botanische Jahrbucher fur Systematik 23: 19 (1897) APNI

Taxonomic status:Accepted

Occurrence status:Present

Establishment means:Native

Threat status:Victoria: vulnerable (v)


Newly discovered for Victoria in 2011.

Annual herb, erect, to 60 cm tall, glabrous. Leaves mostly alternate, narrowly ovate to linear, 0.5–7 cm long, 1–10 mm wide, sessile; apex acute; base rounded to obtuse. Flowers 1–7 in axillary cymes or clusters; pedicle to 4 mm long; hypanthium tubular, 4–6 mm long, c. 1.5 mm diam., appendages 4–6, narrowly triangular, c. 1 mm long; sepals 4–6, triangular, c. 0.3 mm long; petals 4–6, spreading, broadly ovate, 2–4 mm long, pink or purple; stamens 8–12, exserted. Capsule cylindric, about the same length as hypanthium, dehiscing by 4 valves. Flowers Dec. (2 records).

MuM, VRiv. All mainland states. Apparently restricted in Victoria to seasonally inundated Black Box woodlands south of Swan Hill.

Lythrum paradoxum and L. wilsonii are only known from 2 sites in northern Victoria where they also grow with L. hyssopifolia. Both L. paradoxum and L. wilsonii have flowers in clusters, but L. paradoxum made be distinguished from L. wilsonii by its taller, consistently erect habit, larger leaves, and more numerous and exserted stamens.

Stems with solitary flowers can resemble those of L. hyssopifolia. However, solitary flowers tend to more infrequent than clustered flowers, and stamens are always exserted. Whereas L. hyssopifolia consistently has 1 (rarely 2) flower per axil and stamens that are included or only slightly exserted.   

Created by: Andre Messina, 2016-06-03
Distribution map
life Life
kingdom Plantae
phylum Tracheophyta
superorder Rosanae
order Myrtales
family Lythraceae
genus Lythrum
Higher taxa


Source: AVH (2014). Australia's Virtual Herbarium, Council of Heads of Australasian Herbaria, <>. Find Lythrum paradoxum in AVH ; Victorian Biodiversity Atlas, © The State of Victoria, Department of Environment and Primary Industries (published Dec. 2014) Find Lythrum paradoxum in Victorian Biodiversity Atlas
  Bioregion Occurrence status Establishment means
Murray Mallee present native
Victorian Riverina present native

State distribution

Distribution map
Western Australia
Northern Territory
South Australia
New South Wales