Myrcianthes prodigiosa is a very remarkable species, eas-ily distinguished from other species of Myrcianthes by its elliptic or elliptic-obovate leaves, its large dichasia, its large flowers and fruits, and its trilocular ovary (McVaugh 1963, Grifo 1992, Kawasaki et al. 2019). Examining flowers of Díaz-Rueda et al. 2619, we have seen flowers with a trilocu-lar ovary as described by McVaugh in 1963 (Fig. 2a), but we found also flowers with a bilocular ovary (Fig. 2b); in these flowers, we found 15-20 ovules per locule. When M. prodi-giosa was described (McVaugh 1963), fruit characters were evaluated using immature fruits (Grifo 2003). Here we ex-pand the description of fruits and seeds based on mature fruits from the specimens examined, as follows:Fruits green or yellowish-green, dark brown when dry, widely fusiform, widely ellipsoid or sometimes globose, 8–11 × 5.5–7 cm, glabrous, smooth, with minute yellow-ish golden glands, calyx persistent in ripe fruit with five calyx lobes; seeds 1 (–2), globose or ellipsoid, sometimes slightly reniform, 5.5–6.5 × 4–5 cm, seed coat coriaceous, brown; embryo with two separate and unequal plano-con-vex cotyledons, with minute yellowish golden to light brown glands. 
 Myrcianthes prodigiosa has, by far, the largest fruit with-in Myrcianthes; Myrcianthes species (except M. prodigio-sa) have fruits 0.3–3 cm in diameter, while ripe fruits of M. prodigiosa are 5.5–7 cm in diameter. Also, our findings allow us to confirm that this species has one of the largest fruits of the fleshy-fruited neotropical native Myrtaceae.