Biology:Moraea aristata

Short description: Species of plant in the family Iridaceae

Moraea aristata
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Clade:	Angiosperms
Clade:	Monocots
Order:	Asparagales
Family:	Iridaceae
Genus:	Moraea
Species:	M. aristata
Binomial name
Moraea aristata (D.Delaroche) Asch. & Graebn.
Synonyms
Ferraria ocellaris Salisb. Ferraria tricuspis Willd. Iris imberbis Ker Gawl. Iris pavonia Curtis Iris tricuspis Willd. Moraea glaucopis (DC.) Drapiez Vieusseuxia aristata D.Delaroche Vieusseuxia glaucopis DC.

Moraea aristata is a species of flowering plant in the family Iridaceae. It is referred to by the common names blue-eyed uintjie or Blouooguintjie in Afrikaans.It is endemic to the city of Cape Town and is considered to be critically endangered.

Description

Moraea aristata is a winter-flowering bulb (geophyte) that produces large and striking flowers. It grows 25–35 cm (9.8–13.8 in) tall and sometimes branches once. It has one linear leaf growing from the base. It is usually longer than the stem, and often trails on the ground. The stem and leaf are hairless. The corms have a diameter of around 15 mm (0.59 in) and are covered in pale fibers.

Flowers are present in September. They grow on the end of the stem, or sometimes on short side branches. The outer tepals are white, with a large spot of iridescent blue at the base of each one. The blue patches are outlined in violet, or sometimes yellow and have a broad, black, hairy base. The tepal claws are yellow and speckled with black or violet. The inner tepals split into three lobes, with a long, straight central cusp. While each flower lasts only three days, several flowers are produced over a period of three to four weeks.

The seed capsules have an oblong shape and split open from the top. They contain light brown, angular seeds.

Distribution and habitat

This plant naturally only occurs in Peninsula Shale Renosterveld vegetation in northern Cape Town. Due to the growth of the city, its habitat now mostly lies under urban sprawl. Until recently, it only naturally survived in the grounds of the South African Astronomical Observatory in the suburb of Observatory near the foot of Devil's Peak. This tiny, isolated population is not sustainable in the long term due to low genetic diversity and ongoing human disturbance. In 2017 and 2018, it was reintroduced to the Rondebosch Common, providing new hope for its survival in the wild. The species has also become natrualised in Australia.

Ecology

The blue-eyed uintjie is pollinated by monkey beetles, which are drawn to the center of the flowers by the blue nectar guides on the petals.

Seed dispersal occurs through wind. Seeds are released when the seed capsules split open in summer.

Conservation

This species is classified as being critically endangered by SANBI as it has lost most of its habitat to urbanisation. In spite of its extraordinary rarity in the wild, it is easy to cultivate in sunny gardens with sandy or clay soils.

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  Plants photographed in the grounds of the South African Astronomical Observatory

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  Detail of inflorescence

Further reading

• Goldblatt: The Moraeas of Southern Africa. Annals of Kirstenbosch Botanic Gardent Vol.14 CTP Book Printers Cape 1986. ISBN:0-620-09974-7

Wikidata ☰ Q6908979 entry