CMT: This species as circumscribed here is characterized by its medium-sized elliptic leaves that often dry darkened; its corymbiform inflorescences with the flowers all pedicellate in umbelliform groups of 3-11, with the pedicels mostly equal in length, 1-3 mm long, and elongating as the fruits develop; and its rather straight to somewhat curved corollas with a well developed tube ca. 9 mm long and much longer than the lobes, which are ca. 2 mm long. Several other species are similar to Chassalia moramangensis, but can be separated by their verticillate leaves, inflorescences with the flowers arranged in dichasial cymules with the terminal flower subsessile to sessile and the other borne on axes or pedicels of different lengths, and/or corollas that are markedly curved or lobed more deeply. These other species include Chassalia pentachotoma, which is sympatric and has flowers in dichasial cymes, and Chassalia catatii and Chassalia ternifolia, which have pedicellate flowers in smaller groups with the pedicels often unequal and verticillate leaves. One specimen included here has the features of Chassalia moramangensis, in particular the characteristic inflorescence arrangement and fruit form, along with ternate leaves; this appears to be an unusual plant of this species (Ranaivojaona et al. 1073). The persistent stipules frequently become somewhat enlarged and indurated to produce a well developed dry sheath, and Chassalia moramangensis is similar in this regard to Chassalia tsarataranensis, which has flowers arranged in dichasial cymes, with some sessile, and a high montane habitat.