According to a note by the late Mr. Bail, in his 
Herbarium now at Kew, that able European botanist who 
had botanized in Transylvania, regarded D. callizonus as 
hardly different from D. nitidus, which is a much taller, 
more slender plant, with much smaller flowers. 
D. callizonus was purchased from F. Sundermann, of 
Bavaria, in 1889, and flowered in the Rockery of the Royal 
Gardens in June, 1891, where, as Mr. Dewar informs me, 
it flourishes in an Eastern exposure.—J. D. H. 
Fig. 1, Bracts and calyx, of the natural size; 2, petal; 3, stamens and 
pistil; 4 and 5, anthers :—all enlarged. 
