Senna clavigera (Domin) Randell
Randell, B.R. (1988) Journal of the Adelaide Botanic Gardens 11(1): 39.
Pepper Leaf Senna
Usually flowers and fruits when about 60 cm high but can grow to a height of 1.5 m.
Stipules +/- triangular, about 1-2 mm long. Leaflet blades about 30-60 x 7-15 mm, the terminal pair largest. About eight leaflets per leaf. Compound leaf rhachis and leaflet stalks sparsely clothed in pale hairs. Compound leaf rhachis and compound leaf petiole channelled on the upper surface. A conspicuous stalked gland visible on the upper surface of the petiole just above its junction with the twig.
Cotyledons obovate, about 13-15 x 10 mm, held +/- vertical and appressed to the stem. First pair of true leaves pinnate, each leaf usually consists of four leaflets, the terminal pair being larger than the basal pair. Stipules linear. At the tenth leaf stage: stipules linear to narrowly triangular, about 3-4 mm long. A single globose gland usually visible on the upper surface of the compound leaf rhachis between the first pair of leaflets. Compound leaf rhachis grooved on the upper surface. Seed germination time 7 to 8 days.