''Moraea bituminosa'' is a species of the genus '' Moraea'' in family

Iridaceae Iridaceae is a family of plants in order Asparagales, taking its name from the irises, meaning rainbow, referring to its many colours. There are 66 accepted genera with a total of c. 2244 species worldwide (Christenhusz & Byng 2016). It include ...

. It is a

corm A corm, bulbo-tuber, or bulbotuber is a short, vertical, swollen underground plant stem that serves as a storage organ that some plants use to survive winter or other adverse conditions such as summer drought and heat (perennation). The word ' ...

ous

geophyte A storage organ is a part of a plant specifically modified for storage of energy (generally in the form of carbohydrates) or water. Storage organs often grow underground, where they are better protected from attack by herbivores. Plants that have ...

25 – 30 cm high with two leaves. The plant is sticky to the touch. Flowers are yellow with deep yellow nectar guides. The outer

tepal A tepal is one of the outer parts of a flower (collectively the perianth). The term is used when these parts cannot easily be classified as either sepals or petals. This may be because the parts of the perianth are undifferentiated (i.e. of very ...

s are 22–32 mm long and inner tepals are 20 to 29 mm long. It flowers from October to December with flowers opening in the afternoon. It is

endemic Endemism is the state of a species being found in a single defined geographic location, such as an island, state, nation, country or other defined zone; organisms that are indigenous to a place are not endemic to it if they are also found elsew ...

to the

Western Cape The Western Cape is a province of South Africa, situated on the south-western coast of the country. It is the fourth largest of the nine provinces with an area of , and the third most populous, with an estimated 7 million inhabitants in 2020 ...

, from

Bredasdorp Bredasdorp is a town in the Southern Overberg region of the Western Cape, South Africa, and the main economic and service hub of that region. It lies on the northern edge of the Agulhas Plain, about south-east of Cape Town and north of Cape Agul ...

in the south-east to

Wellington Wellington ( mi, Te Whanganui-a-Tara or ) is the capital city of New Zealand. It is located at the south-western tip of the North Island, between Cook Strait and the Remutaka Range. Wellington is the second-largest city in New Zealand by me ...

and Tulbagh in the north, on stony sandstone slopes.Goldblatt: The Moraeas of Southern Africa. Annals of Kirstenbosch Botanic Garden Vol.14 CTP Book Printers Cape 1986. It was first described by Carolus Linnaeus the Younger in 1782 as ''Iris bituminosa''. In 1805, John Bellenden Ker Gawler moved this species to its current name, ''Moraea bituminosa''.

References

bituminosa Plants described in 1782 {{Iridaceae-stub