Cas or cus?

Cas or cus?

Observation - Cas or cus? - Southern Africa. Description: Parasitic plant. Very slender and much twinning along low growing grasses etc. Small white flowers with 5 petals. Should have taken more pics.!

Parasitic plant. Very slender and much twinning along low growing grasses etc. Small white flowers with 5 petals. Should have taken more pics.!