Axis rami floriferi obtusangulus velangulatus, glaber vel in inflorescentia paulum tomentosus. Aculei sat numerosi, e basibus dilatatis et compressis paulumreclinati, vel recti vel parum curvati. Folia pinnata 2-juga, superiora 3-nata vel simplicia, acute et lequaliter duplicato-serrata, supra glabra, viridia, subtus cano-tomentosa. Foliolaomnia fere congruentia, e basibus integris ovata, breviter acuta;foliolum terminale foliolis lateralibus paulum majus, sua parte petioli dupliter longius; foliola lateralia distincte petiolulata,inflma eorum parte infima petioli longiora. Petiolus glabrescens eglandulosus, supra canaliculatus, aculeolis curvatis armatus.Stipulse petiolo adnatae, lineares. Inflorescentia angusta foliosa, plus minus interrupta, ramulis brevibus ex axillis foliorum et panicula brevi contractaefoliosa composita. Pedicelli cano-tomentosi, sepalis fere aequilongi. Calyx fere ad basin partitus. Sepala cano-tomentosa eglandulosa, e basi latiore ovata vel ovato-lanceolata, brevissime acuminata. Petala sepalis et stamina stylis fere aequilonga. Carpella tomentosa.
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