Closest relatives of Siphocampylus siberiensis, based on molecular phylogeny of Lagomarsino et al. (2014). A Flower of Siphocampylus boliviensis B Flower of Siphocampylus tunarensis C Flower of Siphocampylus tunicatus D Flower of Siphocampylus umbellatus E Habit of Siphocampylus tunarensis, shown with L. Lagomarsino F Habit of Siphocampylus tunicatus, shown with D. Santamaría-Aguilar. All photos taken in the field by L. Lagomarsino (A–D, F) and D. Santamaría-Aguilar (E). AL. Lagomarsino et al. 239B, EL. Lagomarsino et al. 232C, FL. Lagomarsino et al. 235DL. Lagomarsino et al. 193.