Rhamphicarpa fistulosa (common name: rice vampireweed) is a flowering plant species in the Orobanchaceae family (formerly in the Scrophulariaceae family) - and the genus Rhamphicarpa. The plant is pale-green but can turn reddish towards maturity. It has needle-like leaves and white flowers with long corolla tubes. The flowers only open after sunset and are supposedly pollinated by night moths. The plant has a broad distribution in Africa (from Guinea to Madagascar and from Sudan to South Africa) and can also be found in New Guinea and northern Australia.