Apium prostratum subsp. prostratum

Apium australe Thouars, Esq. Tristan d'Acugna 43. 1804.*
Apium proslratum Labill. Voy. Perouse 1: 141. 1799 (nomen nudum); Nov. Holl. PI. 1: 76. 1804.
Petroselinum proslratum DC. Prodr. 4: 102. 1830.
Helosciadium proslratum Bunge in Lehm. PI. Preiss. 1: 295. 1845.
Helosciadium auslrale Bunge in Lehra. PI. Preiss. 1: 294. 1845.
Apium anlarctiatm Banks & Sol.; Hook. f. Fl. Antarct. 2: 287, as syn. 1846.
Apium Madovianum Gand. Bull. Soc. Bot. Fr. 59: 709. 1913.
Selinum chrysostomiale E. H. L. Krause, Beih. Bot. Centr. 32 2 : 346. 1914.
Plants terrestrial, biennial or perennial, from a taproot, the stems prostrate or decumbent to suberect, 1.5-7 dm. long, sometimes rooting at the nodes; leaves oblong-ovate in general outline, excluding the petioles 5-25 cm. long, 2-4.5 cm. broad, usually bipinnate with few pairs of ovate primary leaflets, the ultimate divisions usually 3-lobed or toothed; petioles 2-6 cm. long; cauline leaves like the basal; umbels sessile or very short-pedunculate; involucre wanting; involucel wanting; rays 5-15, 2-6 cm. long; pedicels 2-3 mm. long; calyx-teeth minute but evident; carpophore shortly bifid; fruit suborbicular, 2-2.5 mm. long, the ribs prominent, broader than the intervals.
Type locality: Presumably Tristan da Cunha. collector unknown.
Distribution: South America, Australia, Tasmania, and New Zealand; adventive at Torrey Pines, San Diego County, California.

Apium australe is a species of the genus Apium of the family Apiaceae. It is an perennial herb with a distribution in salt-marsh and saline habitats of Southern South America.

Apium australe é uma espécie do gênero Apium da família Apiaceae. É uma erva perene com distribuição em habitats de sal-pântano e salinas do sul da América do Sul.