Assertion: mulberry | /r/HasProperty | cultivars of morus alba
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Source sentences:
text: Most mulberries sold for fruit in the United States are cultivars of Morus alba (White Mulberry), Morus rubra (Red Mulberry), Morus nigra (Black Mulberry), and Morus macroura (Himalayan Mulberry), or hybrids (crosses) between M. alba and M. rubra, and possibly M. macroura.