Crocus sativus

Saffron to eat and pretty aurtumn flowers. (you can just pick the stamens if you have a few plants rather than pull the flowers off)

Commonly known as saffron crocus or autumn crocus. Believed to be native to the Mediterranean area, Asia Minor, and Iran, the saffron crocus has long been cultivated in Iran and Kashmir and is supposed to have been introduced into Cathay (China) by the Mongol invasion. It is mentioned in a Chinese materia medica (the Bencao gangmu, 1552–78)

Loves full sun, shingle gardens... Will tolerate drought. 

Collecting the threads (the whole flower os the quickish way) Safa.daneshvar, CC BY-SA 3.0 <https://creativecommons.org/licenses/by-sa/3.0>, via Wikimedia Commons

Юрий Данилевский, CC BY-SA 4.0 <https://creativecommons.org/licenses/by-sa/4.0>, via Wikimedia Commons