Task: Sentence Expansion
Input (English): Mulberry leaves , particularly those of the White Mulberry , " Morus alba " , are important as food of the silkworm , the cocoon of which is used to make silk .
Output (English): Mulberry leaves , particularly those of the white mulberry , are ecologically important as the sole food source of the silkworm ( " Bombyx mori " , named after the mulberry genus " Morus " ) , the cocoon of which is used to make silk .