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Electronic Flora of South Australia species Fact Sheet

Brachycome dichromosomatica

Citation: C. Carter, Telopea 1:391 (1978) var. dichromosomatica.

Synonymy: B. lineariloba sensu J. Black, Fl. S. Aust. 852 (1957), partly, non (DC.) Druce.

Common name: None

Annual herb to 25 cm high; stems short-branched, erect, glabrous; leaves basal and near-basal, not forming a rosette, pinnatisect with 5-9 linear obtuse segments, 3-8 cm long, glabrous.

Peduncles unbranched, robust, glabrous, leafless, passing into the leafy stems, 3-20 cm long; receptacle hemispherical, 2-3 mm diam.; involucral bracts 8-13, obovate, obtuse, 3.5-6 mm long, green, with entire or torn margins, rarely purplish; ray florets 8-16; ligules broadly linear, 5-12 mm long, pale- to bright-blue or violet; anthers with terminal appendages.

Achenes broadly cuneate, 3-5 mm long, terete, pale-brown; margins with broad turgid wings, ciliate with silky glandular hairs to 2 mm long; faces smooth; pappus prominent, 1-1.5 mm long, of unequal bristles fused in bundles.

Distribution:  On dry creek beds and clay pans.

Conservation status: native

Flowering time: June — Sept.

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

Biology: Very close to B. eriogona, of which it may be a subspecies, differing in the straight achenes and often larger size. B. dichromosomatica is separated from B. lineariloba on the basis of its karyotype of 2n = 4 plus 0-3 B chromosomes.

Author: Not yet available

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