Revision of the fern genus Orthiopteris (Saccolomataceae) in Malesia and adjacent regions


	Sporangia of Orthiopteris, note the unequal-sized annulus cells. a O. henriettae (Malcomber et al. 2246, MO) b O. firma (Green 1793, K). All scale bar 0.1 mm.

Part of: Luong TT, Hovenkamp PH, Sosef MSM (2015) Revision of the fern genus Orthiopteris (Saccolomataceae) in Malesia and adjacent regions. PhytoKeys 53: 39-71. https://doi.org/10.3897/phytokeys.53.4955