''Diascia rigescens'', called the stiff twinspur, is a species of flowering plant in the genus '' Diascia'', native to South Africa. It has gained the

Royal Horticultural Society The Royal Horticultural Society (RHS), founded in 1804 as the Horticultural Society of London, is the UK's leading gardening charity. The RHS promotes horticulture through its five gardens at Wisley (Surrey), Hyde Hall (Essex), Harlow Carr (Nort ...

Award of Garden Merit The Award of Garden Merit (AGM) is a long-established annual award for plants by the British Royal Horticultural Society (RHS). It is based on assessment of the plants' performance under UK growing conditions. History The Award of Garden Merit ...

References

Scrophulariaceae Endemic flora of South Africa Plants described in 1836 {{Scrophulariaceae-stub