P. veitchii — Auburn River provenance

Give it bright filtered daylight or gentle morning sun. Increase sun exposure gradually, and shade it from harsh midday sun in hot weather. Indoors, use a bright window with intense sun softened by a sheer curtain, or a grow light. Keep air moving around the crown and fronds.

Protect it from frost and avoid hot, enclosed positions in summer.

A slow-growing, colony-forming silver elkhorn with stiff, ascending to erect fertile fronds and a compact, drought-adapted habit. Like other P. veitchii, plants are densely clothed in pale stellate hairs and become most silvery under strong light. Size and posture vary with age, culture, genotype, and the particular cultivated line.

The sterile shield fronds form an appressed, rounded to kidney-shaped nest. Their upper margin divides deeply into narrow, finger-like lobes; cultivated Auburn River material is especially marketed for a tall crown of long, fine, pointed lobes that rise above the growing point. Old shields dry papery grey to pinkish brown.

The fertile fronds are narrow, firm, and generally ascending to erect, with a dense silver-white covering of stellate hairs, especially beneath. They fork into narrow terminal lobes, with sori borne across much of the lower surface of the terminal segments. Plants sold as Auburn River are commonly described as having a strongly upright stance and more numerous or finer terminal forks than ordinary trade P. veitchii, but that market distinction has not been tested across the wild population.

Best recognized as P. veitchii by the combination of deeply finger-lobed shields, stiff upright fertile fronds, and persistent silver-white stellate hairs. In horticulture, Auburn River plants are sought for an unusually high, narrow, pointed shield crown and erect, finely divided fertile fronds. Those features describe cultivated trade material and should not be assumed to identify every Auburn River wild genotype or authenticate provenance without records.

2023

A geographic trade label derived from Auburn River and Auburn River National Park in Queensland, Australia; it is not established as a cultivar denomination.