Monday, July 30, 2018

[Botany • 2018] Ptilotus yapukaratja (Amaranthaceae) • A New Species from the Gascoyne Bioregion of Western Australia

Ptilotus yapukaratja R.W.Davis & T.Hammer

in Davis & Hammer, 2018.  

Ptilotus yapukaratja. plant in situ, showing habit and habitat.  
Image by K. Millet from K. Millet 346. 

Ptilotus yapukaratja R.W.Davis & T.Hammer, sp. nov. 

Diagnostic features: Ptilotus yapukaratja can be distinguished from all other Ptilotus R.Br. species by the following combination of characters: a rigid habit, glabrous incurved leaves, bracts longer than bracteoles, two fertile stamens, an excentrically placed style on the ovary, and a hairy ovary.

Ptilotus yapukaratja. a close-up showing an inflorescence with an open flower.
Image by K. Millet from K. Millet 346.

Distribution and habitat: Currently only known from north of Lorna Glen Station, where it is found at the base of breakaways on shallow rocky slopes in open scrub on brown clayey-sandy soils. 

Conservation status: To be listed as Priority One under Conservation Codes for Western Australian Flora (M. Smith perscomm.). Ptilotus yapukaratja is only known from the one remote location north of Lorna Glen Station. 

Etymology. The epithet derives from the Matuwa words yapu (rock) and karatja (belonging to), referring to the rocky habitat where the species occurs.

Robert W. Davis and Timothy A. Hammer. 2018. Ptilotus yapukaratja (Amaranthaceae), A New Species from the Gascoyne Bioregion of Western Australia. Nuytsia: The Journal of the Western Australian Herbarium. 29; 157–160.