Could be

Mabberley:
Zantedeschia, a genus of 6 spp in Araceae

Zantedeschia aethiopica: arum lilly
Zantedeschia elliottiana: yellow arum lilly
PvR

Jie-san Laushi schreef

arum = ?

Why didn't I think of this before... Since the setting is South Africa,
could this arum be a plant now widely grown as an ornamental 'round the
world, and known in English as "calla-lily"? The genus is Zantedeschia. If
so, surely it is grown also in Itlay, and has an italian name?

Jie-san Laushi

Huodau lau, xuedau lau, hai you sanfen xue bulai
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