Patersonia umbrosa
species of plant
Patersonia umbrosa, commonly known as yellow flags, is a species of plant in the iris family Iridaceae and is endemic to the south-west of Western Australia. It is a loosely-tufted, rhizome-forming, perennial herb with linear to sword-shaped leaves and deep bluish-violet or bright yellow tepals.
Description
Patersonia umbrosa is a loosely-tufted perennial herb with linear to sword-shaped leaves 300–900 mm (12–35 in) long and 4–6 mm (0.16–0.24 in) wide. The flowering scape is 300–800 mm (12–31 in) long and glabrous with the sheath enclosing the flowers narrowly lance-shaped, green, prominently veined and 60–85 mm (2.4–3.3 in) long. The outer tepals are deep bluish violet or bright yellow depending on variety, and egg-shaped to rhombic, 25–35 mm (0.98–1.38 in) long and 20–25 mm (0.79–0.98 in) wide, the hypanthium tube about 50 mm (2.0 in) long.
Taxonomy and naming
Patersonia umbrosa was first described in 1846 by Stephan Endlicher in Lehmann's Plantae Preissianae. The specific epithet (umbrosa) means "growing in the shade".
In 1912, Karel Domin described two varieties in the Journal of the Linnean Society, Botany and the names are accepted by the Australian Plant Census:
Petersonia umbrosa Endl. var. umbrosa had deep bluish-violet flowers from August to November;
Petersonia umbrosa var.
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This entry incorporates text from “Patersonia umbrosa” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.