Sagittaria macrophylla Zucc.

Abh. Math.-Phys. Cl. Koenigl. Bayer. Akad. Wiss. 1: 289 (1832) APNI

Taxonomic status:Accepted

Occurrence status:Present

Establishment means:Naturalised

Emergent  leaves elliptic, rarely sagittate to hastate, 8–25 cm long, 1–8 cm wide; basal lobes when present, attenuate. Inflorescence with 3–5 pseudowhorls of flowers. Bracts 0.7–1.3 cm long. Female flowers with pedicle ascending to spreading, (2.5–)3–11 cm long, distinctly thicker than pedicle of male flowers. Outer perianth lobes reflexed at maturity, 0.7–0.8 cm long; inner perianth lobes white, about twice as long as outer perianth. Filaments of male flowers glabrous. Achene 3.1–3.5 mm long, 2–2.5 mm wide; surface unadorned or with 1–2 narrow wings; apex with persistent base of style 0.4–1.2 mm long.

*MuF, *VRiv. Native to Mexico. Isolated records in creeks near Numurkah and Kerang in northern Victoria.

Sagittaria macrophylla is thought to be closely related to S. platyphylla, the former distinguished by its extremely long, spreading pedicels and glabrous filaments (Adair et al. 2012). In Victoria these two species co-occur, and potentially hybridise. However, the presence of intermediate plants makes it unclear if both species are present in Victoria, or if these specimens that resemble S. macrophylla are unusual forms of S. platyphylla

Created by: Andre Messina, 2014-07-21
Updated by: Val Stajsic, 2018-08-30
 
References

Adair, R.J.; Keener, B.R.; Kwong, R.M.; Sagliocco, J.L.; Flower, G.E. (2012). The biology of Australian weeds 60. Sagittaria platyphylla (Englemann) J.G. Smith and Sagittaria calycina Englemann, Plant Protection Quarterly 27: 47-58.

Distribution map
life Life
kingdom Plantae
phylum Tracheophyta
superorder Lilianae
order Alismatales
family Alismataceae
genus Sagittaria
Higher taxa

Victoria

Source: AVH (2014). Australia's Virtual Herbarium, Council of Heads of Australasian Herbaria, <http://avh.chah.org.au>. Find Sagittaria macrophylla in AVH ; Victorian Biodiversity Atlas, © The State of Victoria, Department of Environment and Primary Industries (published Dec. 2014) Find Sagittaria macrophylla in Victorian Biodiversity Atlas
  Bioregion Occurrence status Establishment means
Victorian Riverina present naturalised
Murray Fans present naturalised

State distribution

Distribution map
State
South Australia
Australian Capital Territory
Victoria