Microloma calycinum, commonly known in Afrikaans as the bokhoring (antelope horn or goat horn) and sometimes called the star minimouth, is a twiggy shrublet with clear sap. Germination happens in winter, the rainy season.
It has drooping, opposite leaves that are narrowly oblong.
The pink or red flowers in small clusters have long, narrow leaves with pointed tips. Flowering happens from winter to after midspring.
The species distribution is in the Northern Cape, the Richtersveld, further south in Namaqualand, also in southern Namibia. The photo was taken near Springbok.
The habitat is dry, stony flats and slopes in succulent Karoo. The habitat population is deemed of least concern early in the twenty first century (Manning, 2009; iNaturalist; http://redlist.sanbi.org).