 Large and Braggins (2004) note that "A. doctersii" may in fact be of hybrid origin between "A. javanica" and a member of the "Alsophila latebrosa" complex.When Carl Blume described "A. javanica" (as "Cyathea javanica"), he also named one variety, "rigida".Large and Braggins (2004) note that although variety "rigida" is apparently part of the "A. javanica" complex, the name has also occasionally been associated with "Alsophila polycarpa".