Trachymene from the Greek 'trakhys' meaning rough and 'mene' meaning moon; alluding to the appearance of the fruit. Ceratocarpa from the Greek 'keras' meaning horn and 'karpos' meaning fruit; referring to the horn-like fruit
Distribution and status
Found scattered in the western part of South Australia, growing on red or yellow soils in sand dunes. Also found in Western Australia, Northern Territory and New South Wales. Native. Common in South Australia. Rare in the Northern Territory. Common in the other states.
Herbarium regions: North Western, Lake Eyre, Nullarbor, Gairdner-Torrens, Eyre Peninsula
NRM regions: Alinytjara Wilurara, Eyre Peninsula, South Australian Arid Lands
AVH map: SA distribution map (external link)
Decumbent to erect annual herb to 15 cm high, stems glabrous or rarely with scattered hairs. Basal leaves circular-cordate, to 21 mm long, palmately divided into 3 obovate-cuneate lobed segments, sometimes further divided into 2 or 3 secondary lobes with petiole to 40 mm long. Stem leaves smaller, less divided, glabrous or with a few scattered hairs. Inflorescence in group of 3–5 on pedicels very short. Flowers blue or white. Sepals absent. Petals ovate, imbricate, not inflexed at apex.
Fruit laterally compressed, circular, 3–4 mm long, 6-ribbed on each side; apical appendage 3–5 mm long, horizontally spreading. Seeds are 4x1
|Location||No. of seeds|
|BGA||4,300 (8.37 g)||30+||16-Sep-2009||TST743|
|BGA||3,100 (11.01 g)||30||18-Sep-2009||TST763|