|Editorial; Systematic implications of chloroplast DNA sequence variation in the Opuntioideae (Wallace & Dickie);|
Seed characters and the classification of the Opuntioideae (Stuppy);
On the evolution of the North American Opuntioideae (Pinkava);
Realignment and revision of the Opuntioideae of Eastern Brazil (Taylor, Stuppy & Barthlott);
The Andean opuntias: An annotated checklist of the indigenous non-platyopuntioid opuntias of South America (Iliff);
That's Opuntia, that was! (Hunt); Alphabetical list of currently accepted species (Hunt).
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