Stamen structure of Humiriaceae. A Sacoglottis perryi stamen cluster of 2 types, ventral B Sacoglottis perryi stamen cluster of 2 types, dorsal C Sacoglottis perryi short-stamen anther with open stomium and pollen D Sacoglottis guianensis androecium with interstaminal staminodes (st), dorsal E Schistostemon macrophyllus stamen cluster of 3 types, ventral F Schistostemon macrophyllus stamen cluster of 3 types, dorsal G Schistostemon oblongifolius trifurcate filament tip, dorsal. Sources: A–C Tripp 2984 D Carvalho et al. 4396 E, F Maas et al. 6577 G Maas et al. 6804 (all US).

 
 
  Part of: Wurdack KJ, Zartman CE (2019) Insights on the systematics and morphology of Humiriaceae (Malpighiales): androecial and extrafloral nectary variation, two new combinations, and a new Sacoglottis from Guyana. PhytoKeys 124: 87-121. https://doi.org/10.3897/phytokeys.124.34679