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Notes:
This species is characterized by its rather well developed ligulate to lanceolate stipules that are held erect in bud and have linear glands on the margins, its oblancolate medium-sized leaves, its lax paniculiform inflorescences with well developed axes and reduced bracts, its pedicellate flowers with rather long slender salverform corollas, and its rather small obovoid purple fruits. The inflorescences are often produced in a pseudoaxillary position and the peduncles frequently are quite well developed. This species is unusual in Rudgea. It has some morphological variation in leaf form and degree of expansion of the inflorescences, and the various forms have been described as distinct species but are linked by continuous variation. The unusual stipules have generated confusion as to the genus relationship of this species, but it does appear to be related at least generally to Rudgea (Bruniera, 2015). Rudgea stipulacea is similar to one other species, Rudgea pendula of the the northwestern Andes.
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