Allelopathic effects of S. parviflora Bth. on seed germination and seedling growth of S. sudanense Cv. Dale, L. culinaris, P. radiatus, P. vulgaris, B. campestris, B. chinensis, R. sativus, T. u lexandrum, S. italica and C. arietinum were studied in the laboratory. Aqueous extracts, litter-bed of shoots and roots, and volatiles fron entire plants of S. parviflora invariably arrested both germination and seeding growth under laboratory conditions. The inhibitory effects were species specific. The roots were generally more toxic than shoots. Soil leaching due to rains rectified the toxic effects of added toxins. The findings suggests that S. Parviflora is potentially allelopathic.