Booklet  (1938)  Page(s) 126.  
 
Japanese Peonies (albiflora)
Dragon's Head (30)
Medium size, white with amaranth purple blotches, midseason. Staminodes yellow with yellow filaments, resembling normal stamens. Carpels smooth, tips dark red; disk conspicuous, pink. Plant medium size, spreading. A variety more like a single and with pink-tipped carpels and inconspicuous pink disk was also received under this name.

Book  (1928)  Page(s) 58.  
 
Check List of Japanese Peonies
Dragon's Head (Tatsugashira). Crimson.

Website/Catalog  (1921)  Page(s) [6].  
 
Japanese Peonies
Dragon's Head...$1.50

Website/Catalog  (1915)  Page(s) 42.  
 
Japanese Peonies
Including direct importations from Japan, and Kelway's "Imperial" and Hollis' New Seedling Japanese Peonies
A new race of Peonies of a distinct type, forming a separate class, intermediate between the single and the double types, and distinguished by their stamens being transformed into narrow petaloids. [...]
I have retained the Japanese names, with their translation, prefixed by the Amreicannames, which were given to this set by the Peony Society of the American Florists.
Dragon's Head (Tatsugashira—Dragon's head). Syn. Floradora. Yellow stamens, surrounded by large petalsm pale rose striped dark crimson. Very odd and striking. $1.

Website/Catalog  (1898)  Page(s) 12.  
 
Paeonia Officinalis. (Herbaceous Peonies.)
A rich Japanese flower, perennial, flowering in middle of summer.
12. Tatsugashira. Rose, striped with crimson.