The flowers of Larryleachia cactiformis grow on short pedicels near the tips of the bluntly rounded stem tips. The ovate, acutely pointed and hairless sepals of the flowers are hidden behind the larger corollas.

The unopened buds in picture are greenish cream, the dark seams where the five corolla lobes still connect are visible in the photo. When open, the corolla lobes spread widely around the cup-shaped, shallow flower tube. In picture, the lobes mostly recurve hiding their acutely pointed tips (as seen from above); but the lobes may also spread and not recurve. The flower reaches a diameter of nearly 1 cm.

The corolla colour is pale yellow or cream with blood-red lines and dots scattered along its surface. The red markings vary considerably in size and shape on different plants. 

After flowering a pair of diverging, slightly incurving seed follicles are produced. The seeds are flat and brown (White and Sloane, 1937; iSpot).