Emex australis
Ann. Sci. Nat., Bot., sér. 2, 9: 195, plate 7. 1838
Common names: Doublegee southern threecornerjack spiny emex
Treatment appears in FNA Volume 5. Treatment on page 487.
Plants 1–4(–6) dm. Stems prostrate, decumbent, or ascending, base often reddish, branched proximally. Leaves: ocrea loose, glabrous; petiole (0.5–)1–8(–15) cm, glabrous; blade subhastate to elliptic or ovate, 1–10 × 0.5–6 cm, base truncate to cuneate, apex obtuse to acute. Staminate flowers 1–8 per ocreate fascicle; tepals narrowly oblong to oblanceolate, 1.5–2 mm. Pistillate flowers 1–4 per ocreate fascicle; outer tepals ovate to oblong, 4–6 mm in fruit, inner tepals broadly triangular-ovate, 5–6 mm in fruit, apex mucronate. Fruiting perianths 7–9 × 9–10 mm, spines ascending or spreading, 5–10 mm, base tapering. Achenes 4–6 × 2–3 mm, shiny. 2n = 20.
Phenology: Flowering year-round.
Habitat: Disturbed sites, especially in sandy soils
Elevation: 0-200 m
Phenology: Flowering year-round.
Habitat: Disturbed sites, especially in sandy soils
Elevation: 0-200 m
Distribution

Calif., Africa (Republic of South Africa), introduced in West Indies (Trinidad), Europe, Asia (India, Pakistan, Taiwan), Africa (Kenya, Madagascar, Malawi, Tanzania, Zimbabwe), Pacific Islands (Hawaii), Australia.
Discussion
References
None.
Lower Taxa
No lower taxa listed.
Facts about "Emex australis"
Author | Craig C. Freeman + |
Authority | Steinheil + |
Common name | Doublegee +, southern threecornerjack + and spiny emex + |
Distribution | Calif. +, Africa (Republic of South Africa) +, introduced in West Indies (Trinidad) +, Europe +, Asia (India +, Pakistan +, Taiwan) +, Africa (Kenya +, Madagascar +, Malawi +, Tanzania +, Zimbabwe) +, Pacific Islands (Hawaii) + and Australia. + |
Elevation | 0-200 m + |
Habitat | Disturbed sites, especially in sandy soils + |
Illustrator | Bee F. Gunn + |
Introduced | true + |
Phenology | Flowering year-round. + |
Publication title | Ann. Sci. Nat., Bot., sér. + |
Publication year | 1838 + |
Reference | None + |
Source xml | https://jpend@bitbucket.org/aafc-mbb/fna-data-curation.git/src/f6b125a955440c0872999024f038d74684f65921/coarse grained fna xml/V5/V5 1016.xml + |
Taxon family | Polygonaceae + |
Taxon name | Emex australis + |
Taxon parent | Emex + |
Taxon rank | species + |
Volume | Volume 5 + |