Patersonia umbrosa

Patersonia umbrosa is a loosely-tufted perennial herb with linear to sword-shaped leaves {{cvt|300–900|mm}} long and {{cvt|4–6|mm}} wide. The flowering scape is {{cvt|300–800|mm}} long and glabrous with the sheath enclosing the flowers narrowly lance-shaped, green, prominently veined and {{cvt|60–85|mm}} long. The outer tepals are deep bluish violet or bright yellow depending on variety, and egg-shaped to rhombic, {{cvt|25–35|mm}} long and {{cvt|20–25|mm}} wide, the hypanthium tube about {{cvt|50|mm}} long.{{cite web |title=Patersonia rudis |url=https://profiles.ala.org.au/opus/foa/profile/Patersonia%20rudis |publisher=Australian Biological Resources Study, Department of Agriculture, Water and the Environment: Canberra |access-date=7 December 2021}}

Patersonia umbrosa was first described in 1846 by Stephan Endlicher in Lehmann's Plantae Preissianae.{{cite web|title=Patersonia umbrosa|url= https://id.biodiversity.org.au/instance/apni/465348|publisher=APNI|access-date=6 December 2021}}{{cite book |last1=Endlicher |first1=Stephan |title=Plantae Preissianae |volume=2 |date=1846 |location=Hamburg |page=31 |url=https://www.biodiversitylibrary.org/item/9228#page/35/mode/1up |access-date=7 December 2021}} The specific epithet (umbrosa) means "growing in the shade".{{cite book |last1=Sharr |first1=Francis Aubi |last2=George |first2=Alex |title=Western Australian Plant Names and Their Meanings |date=2019 |publisher=Four Gables Press |location=Kardinya, WA |isbn=9780958034180 |page=331 |edition=3rd}}

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{{cite web|title=Patersonia umbrosa var. umbrosa|url= https://biodiversity.org.au/nsl/services/apc-format/display/60361|publisher=Australian Plant Census|access-date=7 December 2021}} had deep bluish-violet flowers from August to November;{{cite web |title=Patersonia umbrosa var. umbrosa |url=https://profiles.ala.org.au/opus/foa/profile/Patersonia%20umbrosa%20var.%20umbrosa |publisher=Australian Biological Resources Study, Department of Agriculture, Water and the Environment: Canberra |access-date=7 December 2021}}{{FloraBase|name=Patersonia umbrosa var. umbrosa|id=14432}}
• Petersonia umbrosa var. xanthina (Oldfield & F.Muell. ex F.Muell.) Domin,{{cite web|title=Patersonia umbrosa var. xanthina|url= https://biodiversity.org.au/nsl/services/apc-format/display/60386|publisher=Australian Plant Census|access-date=7 December 2021}} previously known as Patersonia xanthina, has bright yellow flowers from August to October.{{cite web |title=Patersonia umbrosa var. xanthina |url=https://profiles.ala.org.au/opus/foa/profile/Patersonia%20umbrosa%20var.%20xanthina |publisher=Australian Biological Resources Study, Department of Agriculture, Water and the Environment: Canberra |access-date=7 December 2021}}{{FloraBase|name=Patersonia umbrosa var. xanthina|id=11550}}

Variety umbrosa grows in scrub, woodland and forest in poorly-drained soil between the Deep River, the Stirling Range and the Fitzgerald River in the Esperance Plains, Jarrah Forest and Warren biogeographic regions. Variety xanthina grows in forest from the southern Darling Range to the Deep River in the Jarrah Forest, Swan Coastal Plain and Warren biogeographic regions of south-western Western Australia.

Both varieties of P. umbrosa are classified as "not threatened" by the Western Australian Government Department of Biodiversity, Conservation and Attractions.

{{Reflist}}

{{Taxonbar|from1=Q15578989|from2=Q50906149|from3=Q21381590}}

umbrosa

Category:Flora of Western Australia

Category:Plants described in 1846

Category:Taxa named by Stephan Endlicher