Rogeria longiflora(Royen) J.Gay ex DC.

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Rogeria longiflora, also known as the white djirrie, is a species of flowering plant in the genus Rogeria. It is endemic to Namibia.

Rogeria longiflora is found from Namibia to the Northern Cape.

Rogeria longiflora - Wikipedia

Rogeria is a genus of plants in the Pedaliaceae family consisting of several species, with a native range extending from the island of Cape Verde to Eritrea, Namibia to the Cape Provinces (of South Africa).

It is found in the countries of Angola, Burkina, Cameroon, Cape Verde, Chad, Eritrea, Mali, Mauritania, Namibia, Niger, Nigeria, Senegal, Sudan and South Africa. It was also thought to be found in Brazil as well as Africa, but this seems to be a mix-up with another shrub species.

Some species such as Rogeria longiflora are medicinal plants

Rogeria species bear long, tubular flowers but with very woody armoured capsules and flattened seeds.

It is a varied genus, it does not have solitary flowers (similar to Uncarina species) and with the common denominator that in the difference in the size of the carpels and the indehiscence (splitting of the seed capsule) of the adaxial carpel. Species Ceratotheca and Rogeria are known as 'Wind-ballists', this is due to when the fruits open at the top but stay on the plant, then as the stems produce strong movements, the seeds are then gradually expelled from the capsule.

The calyx has five sepals (petals), the corolla is tubular and funnel-shaped. The stamens are four in number, and do not project beyond the border of the corolla. The fruit (or seed capsule) is almost nut-like, opens towards the point. It has 4 - 8 spines, and appears to be 4-6 celled. The cells having either an indefinite number or only solitary seeds.

Species known

According to Kew,

• Rogeria adenophylla J.Gay ex Delile
• Rogeria armeniaca Bedigian
• Rogeria bigibbosa Engl.
• Rogeria longiflora (D.Royen) J.Gay ex DC. ('desert foxglove')

Tropicos (lists, as of 9 August 2021); Rogeria adenophylla, Rogeria armeniaca, Rogeria bigibbosa, Rogeria microcarpa Klotzsch and Rogeria etrophila De Wint.

The genus is accepted by United States Department of Agriculture and the Agricultural Research Service, they accept 3 species, Rogeria adenophylla J. Gay ex Delile, Rogeria bigibbosa Engl. and Rogeria longiflora (L.) J. Gay ex DC.

Rogeria (plant) - Wikipedia

 

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