This species is characterized by its elliptic, leathery, shiny leaves with the secondary veins extending to fuse with the thickened margins, short triangular stipules with well developed aristas, terminal cymose inflorescences with developed peduncles and pedicels, short truncate calyx limbs, salverform white corollas with slender tubes 12-17 mm long and lobes 5-8 mm long, and subglobose to oblate fruits to 20-25 mm in diameter. The leaves are distinctive. The flowers have been infrequently collected. The fruits have also been infrequently collected. Some plants have a distinctive infection of some sort in the flowers, which produces malformed, enlarged, leathery corollas with short lobes that do not open (e.g., Prance et al. 3015).

Faramea boomii is collected infrequently in most areas, and across a wide range. It has been collected frequently in sterile condition in some ecological inventories, in particular in Peru, but infrequently with developed flowers and fruits. Peruvian plants have much larger fruits than those from Venezuela, but whether this is due to clinal variation or different developmental stages is not clear. It is possible that more than one species is included here but the fertile material is so limited this cannot be evaluated.

Faramea boomii is similar to Faramea juruana, with secondary veins that loop to interconnect and then reticulate before reaching the margins. Faramea boomii is also similar to Faramea crassifolia, with smaller leaves on which the venation is not visible and smaller flowers.