Gnephosis of uncertain etymology. Tenuissima from the Latin 'tenuis' meaning very slender; alluding to the slender habit of this species.
Distribution and status
Found across much of South Australia except on Kangaroo island, York Peninsula, Mount Lofty Ranges and the South-east, growing on a variety of soils and habitats. Also found in all mainland states. Native. Common in South Australia. Rare in Victoria. Common in the other states.
Herbarium regions: North Western, Lake Eyre, Nullarbor, Gairdner-Torrens, Flinders Ranges, Eastern, Eyre Peninsula, Northern Lofty, Murray
NRM regions: Alinytjara Wilurara, Eyre Peninsula, Northern and Yorke, South Australian Arid Lands, South Australian Murray-Darling Basin
AVH map: SA distribution map (external link)
Annual herbs to 15 cm high, simple or branched. Leaves elliptic to linear or obovate to oblanceolate, to 30 mm long and 4 mm wide, apex often glassy, scale-like hairs usually present. Flower heads club-shaped or spike-like, to 22 mm long and 7 mm diameter with yellow flowers. Flowering between August and December. Fruits are creamy to pale brown head. Seed embryo type is spatulate.
Seed collection and propagation
Collect seeds between October and February. Collect heads or whole plants that are pale brown or turning brown. Each head should have numerous tiny seeds. Place the heads in a tray for a week to dry. Then rub the heads gently with your hands to dislodge the seeds. Use a fine sieve to separate the seeds from the unwanted material. Be careful as the seeds are very small. Store the seeds with a desiccant such as dried silica beads or dry rice, in an air tight container in a cool and dry place. Seeds are non-dormant, viable seed should germinate readily.