Calectasia grandiflora, commonly known as the blue tinsel lily, is a plant in the family Dasypogonaceae growing as a perennial herb endemic to the south-west of Western Australia.

[1] Flowers appear from June to October (Winter and Spring) overall,[2] though earlier in Perth than in the wheatbelt and Stirling Ranges.

[4] "Large-flowered tinsel lily" has been proposed as an alternate common name to distinguish it from other members of the genus.

[1] Blue tinsel lily grows on sand, sandy clay, gravel, laterite and granite in swampy areas and on rock outcrops, flats, slopes and ridges.

[5] It is endemic to the south-western corner of Western Australia, occurring in the Avon Wheatbelt, Esperance, Geraldton Sandplains, Jarrah Forest, Mallee, Swan Coastal Plain and Warren biogeographic regions.