PEONIES, The Manual of the American Peony Society, ed. by James Boyd, Copyright 1928 by American Peony Society: Tree Peony Check-list.

Yokohama Nurseries, Yokohama, Japan. 1893 catalogue as Yokohama Gardens Association, beginning 1894 as Yokohama Nurseries.

Toki-Wadsu. (Jap-, 1893.) offered by Yokohama Nurseries, Yokohama, Japan. 1893, 1898, 1902, 1905; Japan Nursery Co.1910.

(Japanese tree peony - Purple Flowering group) Rolled and twisted petals. Large size. Stigmas and sheath reddish purple. Early midseason. Small spreading plant.

Wister(1961):

'Toki-wadsu' (Eternal Color) (also name of song) (Jap. bef. 1893)

Carsten Burkhardt's Web Project Paeonia - The Peony Database

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