Calycolpus australis (Myrtaceae) of Minas Gerais, Brazil, is described as a new species. It is perhaps most similar to C. alternifolius but differs in various floral characters. This new species extends the range of the genus six degrees of lati- tude farther south. Calycolpus is a genus of ca. 10 species ranging from Central America to Brazil with the greatest diversity in northeastern South America, especially in the Guyana Highlands (McVaugh, 1969). It is closely related to Psidium, but can be distinguished from that and other related genera by floral and seed coat characters (Landrum & Sharp, 1989). Re- cently a new species has come to my attention from the "campos rupestres" of Minas Gerais of Brazil that extends the southern range of Calycolpus near- ly six degrees of latitude farther south. wide, 1.2-3 times as long as wide; apex acute or acuminate to rounded, sometimes cuspidate; base rounded to acute; petiole weakly channeled or flat, 1-2 mm long, 1-1.5 mm thick, tomentose to gla- brous; midvein impressed above, prominent below; lateral and marginal veins indistinct; blades cori- aceous, drying dark olive-green to reddish brown, with many minute glands visible above; peduncles 1.5-3 cm long, 1.5-2 mm wide at apex, solitary, thinly pubescent; bracteoles apparently caducous early, only one seen, perhaps not typical, ca. 6 mm long, ca. 1 mm wide; calyx lobes two-parted, the base an extension of the hypanthium, ca. 3 mm long, ca. 5-6 mm wide, rectangular, puberulent within and without, slightly concave within, fused along the margins with the adjacent bases for about ? of length, the distal portion of calyx lobe (ap- pendage) leafy, oblong-triangular, glabrous, 6-11