The same as azedarac; the chinaberry or pride-of-India tree, a flowering tree with medicinal and ornamental uses.
A variant spelling of azedarac with the Persian/Arabic root 'dar' (tree), this form appears frequently in older botanical literature and represents different Romanization choices of the same Arabic/Persian term.
What's fascinating is that this single tree has at least 10 different common names (chinaberry, pride-of-India, Persian lilac, Indian lilac) and multiple scholarly spellings—a linguistic reminder that not all languages organize and name nature the same way.
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