Xanthorrhoea preissiiEndl.

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Xanthorrhoea preissii, known as balga, is a widespread species of perennial monocot in Southwest Australia.

The form of the plant resembles a tree, with very long and bunched, grass-like, leaves that emerge from a central base.

The trunk may grow over 3 metres tall, and the often blackened appearance is evidence of its ability to withstand fire. The remains of the flammable leaves and the annual regrowth produce banding, allowing the age of the plant to be determined, and giving a record of previous fires in its habitat. The inflorescence appears on an upright spike, 1.5 m to 2.5 m long, between June and December. The sessile flowers, creamy or white, appear more profusely when stimulated by bushfire.

The name 'balga' is derived from the Nyungar language. This species and other members of the genus Xanthorrhoea are informally termed blackboys or grasstrees. The appearance of the plant was seen as resembling a native inhabitant holding a spear, by the early settlers of the region, leading to the common name blackboy. Today, this term is considered inappropriate.

A description published in 1920, Xanthorrhoea reflexa D.A.Herb., is cited as a taxonomic synonym for this species, as is the name Xanthorrhoea pecoris F.Muell.[5][6] The species description was first published by Stephan Endlicher in the 1846 volume of Plantae Preissianae.

It is found throughout coastal plains, near watercourses, and inland forest regions, in a range extending from Geraldton to Albany and in the Avon Wheatbelt. It occurs on a wide variety of soil types and is sometimes associated with laterite and granite.

Xanthorrhoea preissii - Wikipedia

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