Encyclopedia : Wild & Local strains

East and Southeast Asian strains

Japanese Tokyo Kokei Standard, TKS

Copyright 1998-2017 Yoshiaki Yoneda

Since its introduction to Japan, various mutations have occurred in the morning glory, which has become a gardening flower. Among these cultivated strains, Dr. Y. Takenaka selected the Tokyo Kokei Standard as the genetically normal type. Therefore, it is not a wild strain.
The hypocotyl and the cotyledons are tinged red. Almost no epidermal hairs are on the hypocotyls or on the cotyledonary petiole. The leaf is of the main lobe-narrow type. The flower blooms comparatively early. In Shizuoka-city, for example, sowing seeds in the first half of May will yield blooms from the end of July. The flower is blue tinged with light purple. By comparison, the flower tube is tinged red. The hair on the calyx is white. The flower is 5 or 6 cm in diameter. This strain, selected from cultivated ones, has the characteristics of a purplish blue corolla and a colored flower tube. One flower is generally observed for each peduncle, but there can be two flowers or, rarely, three.
Tokyo Kokei St.-1
Panoramic view
Tokyo Kokei St.-2
Panoramic view
Tokyo Kokei St.-3
Germinating seeds
Tokyo Kokei St.-4
Tokyo Kokei St.-5
Cotyledon compared with that of Peking Tendan (right)
Tokyo Kokei St.-6
Cotyledonary petiole and hypocotyl
Tokyo Kokei St.-7
1st leaf
Tokyo Kokei St.-8
1st leaf and 2nd leaf
Tokyo Kokei St.-9
Tokyo Kokei St.-10
Leaf and flower
Tokyo Kokei St.-11
Side view of flower
Tokyo Kokei St.-12
Young capsule
Tokyo Kokei St.-13
Tokyo Kokei St.-14
Fully-ripened capsule

Edited by Yuuji Tsukii (Lab. Biology, Science Research Center, Hosei University)