Opuntia

Jahn, R. & Schönfelder, P. 1995: Exkursionsflora für KretaMeikle, R.D. 1977: Flora of Cyprus 1

but modified

1	Small shrub, prostrate or ascending, usually less than 0.5 m high; spines up to 50 mm long; fruit 25-50 mm long, with flattish navel Opuntia humifusa
1'	Robust shrub, often with stem, usually 2-5 m high; spines lacking or rarely 1-2, up to 15 mm long; fruit 60-100 mm long, with concave navel Opuntia ficus-indica