Which of the following has trumpet-like flowers: Tecomanthe or Clethra?
Clethra Clethra is a genus of flowering shrubs or small trees described as a genus by Linnaeus in 1753.
Sphenostemon Sphenostemon is the genus of small evergreen trees or shrubs native to New Guinea, Queensland (Australia) and New Caledonia. They have opposite or spiral leaves, and at most small stipules. The small flowers, borne in terminal inflorescences, have free (i.e. unjoined) sepals and petals. The anthers have thick filaments. The fruit, a berry, is fleshy and contains two seeds. The genus is described as "particularly poorly known".