(so named from the famous Petrus Bellonius, who left many valuable tracts on natural history, &c.) a genus of the monogynia order, belonging to the pentandra clas of plants. Of this genus there is only one species known, viz. the aspera, with a rough balm leaf. This is very common in the warm islands of America. It hath a woody stem which rises 10 or 12 feet high, sending out many lateral branches garnished with rough oval leaves placed opposite: the flowers come out from the wings of the leaves in loose panicles, and are succeeded by oval capsules ending in a point, and filled with small round seeds. This plant is propagated by seeds, which must be procured from the places where it grows naturally, and are to be sown in pots plunged into a hot-bed of tanners bark. The plants, when half an inch high, must be transplanted each into a separate pot, and again plunged into the hot-bed, and managed like other tender exotics. These plants may also be propagated by cuttings planted in light earth on a moderate hot-bed, and carefully watered till they have taken root.