calla
  水芋,荷蘭海芋
  Cal·la n.  Bot. A genus of plants, of the order Araceæ.
  Note: ☞ The common Calla of cultivation is Richardia Africana, belonging to another genus of the same order. Its large spathe is pure white, surrounding a fleshy spike, which is covered with minute apetalous flowers.
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  calla
       n 1: South African plant widely cultivated for its showy pure
            white spathe and yellow spadix [syn: calla lily, arum
            lily, Zantedeschia aethiopica]
       2: water arum [syn: genus Calla]