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Ptilotus calostachyus F.Muell.
Weeping Mulla Mulla

Fragm. 6:231 (1868)
Conservation Code
Not threatened
Naturalised Status
Native to Western Australia
Name Status

Erect or spreading perennial, herb or shrub, 0.2-2 m high. Fl. pink-white, Mar to Oct. Red sand, stony sand. Variety of habitats.

Amanda Spooner, Descriptive Catalogue, 30 August 1999

Scientific Description

Perennial herbs or annuals, stems single, more or less erect, glabrous. Leaves present, 10-90 mm long, 1-3 mm wide, glabrous; basal rosette absent; cauline leaves alternate. Spikes pink, cylindrical, solitary, with densely arranged flowers. Bracts (1.2-)1.7-3.2 mm long, colourless, glabrous or hairy, not awned or mucronate, with an obscure midrib. Bracteoles (1.1-)2-3 mm long, colourless, glabrous or hairy, not awned or mucronate, with an obscure midrib. Outer tepals (3-)3.3-6 mm long, entire. Inner tepals (3-)3.3-5.8 mm long, glabrous within. Style 1.4-2.5(-2.7) mm long, straight, centrally fixed to ovary. Seeds (1.1-)1.3-1.5 mm long, glossy, brown. Distribution: Northern and Eremaean Botanical Region; IBRA regions: Central Kimberley, Dampierland, Ord Victoria Plains, Victoria Bonaparte.

R. Davis, 30 April 2019


IBRA Regions
Central Kimberley, Central Ranges, Dampierland, Gascoyne, Gibson Desert, Great Sandy Desert, Great Victoria Desert, Little Sandy Desert, Ord Victoria Plain, Pilbara, Tanami.
IBRA Subregions
Ashburton, Augustus, Chichester, Dune Field, Fortescue, Hamersley, Hart, Lateritic Plain, Mackay, Mann-Musgrave Block, McLarty, Pentecost, Pindanland, Purnululu, Roebourne, Rudall, Shield, South Kimberley Interzone, Tanami Desert, Trainor.
Local Government Areas (LGAs)
Ashburton, Broome, Derby-West Kimberley, East Pilbara, Halls Creek, Karratha, Laverton, Meekatharra, Ngaanyatjarraku, Port Hedland, Upper Gascoyne, Wyndham-East Kimberley.