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Electronic Flora of South Australia species Fact Sheet

Family: Haloragaceae
Gonocarpus mezianus

Citation: Orch., Bull. Auckland Inst. Mus. 10:216 (1975).

Synonymy: Haloragis meziana Schindler, Pflanzenr. 23:29 (1905); H. teucrioides (DC.)Schldl. var. meziana (Schindler)J. Black, Fl. S. Aust. 430 (1926); H. teucrioides (DC.)Schldl. var. glabrata Sonder, Linnaea 28:230 (1856); H. teucrioides sensu Sonder, Linnaea 28:229, 230 (1856), and other authors, auct. non (DC.)Schindler (1847).

Common name: None

Erect or ascending perennial herb 20-30 cm tall (rarely 5-40 cm); stems strongly 4-angled, with spreading or semi-appressed 3- or 4-celled hairs 0.5-1 mm long usually seated on a small multicellular tubercle; leaves decussate, becoming alternate above, subsessile, broadly ovate to cordate, 0.7-1.7 (sometimes to 2.5)cm long, margin thickened, with 8-12 coarse teeth.

Inflorescence bracts alternate, green, lanceolate, 2.3-2.8 (rarely 4.5)mm long, entire or weakly 2- or 3-toothed; bracteoles red-brown, membranous, ovate, 0.7-0.9 mm long, deeply 3-7-toothed; flowers 4-merous, on pedicels c. 0.4 mm long, solitary; sepals reddish-green, deltoid to subcordate, 0.5-0.8 mm long, margins thickened, with a weak basal callus; petals red, 2-3.1 mm long; stamens 8; anthers linear-oblong, 1.5-2.4 mm long; styles clavate, stigmas globular, fimbriate; ovary slate-grey, globular, 0.8-1.2 mm long, weakly 8-ribbed, with 2 or 3 oblique calluses, scabrous.

Fruit silver-grey to slate-grey, 1-1.3 mm long, ornamentation as for ovary.

Published illustration: Orchard (in press) Fl. Aust. 18.

Distribution:  Found on dry rocky soils, often with G. elatus, with which it sometimes hybridises.

S.Aust.: EP, NL, YP, SL, KI, SE.   Vic. (Grampians).

Conservation status: native

Flowering time: Aug, — Feb.

SA Distribution Map based
on current data relating to
specimens held in the
State Herbarium of South Australia

Biology: No text

Taxonomic notes: This species has been confused with G. teucrioides but is easily distinguished by its reddish-brown toothed bracteoles, less robust habit, subcordate thinner leaves with coarser teeth, and in having all flowers alternate.

Author: Not yet available

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