This section is from the book "Handbook Of Hardy Trees, Shrubs, And Herbaceous Plants", by W. Botting Hemsley. Also available from Amazon: Handbook of hardy trees, shrubs, and herbaceous plants.
This genus is remarkable in this division for its scarious involucre and scaly pointed pappus. There are only two species described. The name is an altered form of the Greek katavaykn, from its reputed aphrodisiacal properties.
1. C. caeriilea (fig. 151). - A perennial of straggling habit with handsome blue or blue and white flower-heads. A native of the South of Europe.
Fig. 151. Catananche caerulea. (1/4 nat. size.)
2. C. lutea. - This is an annual species about a foot high with yellow flower-heads. Native of Candia.