Fritze, K. J. & Williams, N. H. 1988: The taxonomic significance of pollen morphology in the Columnea alliance (Gesneriaceae: Gesnerioideae). – Ann. Missouri Bot. Gard. 75: 168-191

Title	The taxonomic significance of pollen morphology in the Columnea alliance (Gesneriaceae: Gesnerioideae)
Authorship	Fritze, K. J. & Williams, N. H.
Date published	1988
Volume	75
In journal	Ann. Missouri Bot. Gard.
Pages	168-191