Sentence Completion

Complete the sentence with ONE word from the passage for each blank.

Saffron is the world's most expensive spice by weight. It comes from the dried stigmas of a purple crocus flower, and each blossom yields only three threads. Because the harvest must be done by hand, producing a single kilogram can require around 150,000 flowers. Grown mainly in Iran, saffron is prized for the warm colour and earthy flavour it lends to dishes across many cuisines.

Saffron is harvested from the of a crocus flower, and the work must be carried out entirely by .