Encyclopedia : Related species

Ipomoea hederacea

(or Pharbitis hederacea) Amerikaasagao


Copyright 1998-2012 Yoshiaki Yoneda
This species is the most closely related to Ipomoea nil. Having originated in tropical portions of the Americas, Ipomoea hederacea is now distributed in many parts of the world. It was introduced into Japan in the Meiji era, but it became naturalized still more once it entered the country with cereals supplied by the United States during the post-World War II food shortage. Now it is settled in wide regions of Japan. The leaf is three-pointed, but the interval part of leaf lobes is curved (Hederacea leaf). Other characteristics include a small, light blue flower and sepals that spread to the outside. There is a round leaf type, too.

Amerikaasagao Ipomoea hederacea (=Pharbitis hederacea) Name of genes (Gene symbols)
Slide No. 159-163, 235-236
Hederaseaba
Hederacea leaf

(coH)
Hederaseaba
Hederacea leaf

(coH)
Maruba
Round leaf

(co)
Maruba
Round leaf

(co)
Inheritance of leaf form
Chromosome
Chromosome and Karyotype
References
  1. Osada, T. (1972) Illustrated Japanese alien plants. Hokuryuukan.
  2. Yoneda, Y. (1995) Asagao, a gift from Edo-era: from dreams to science. Syoukabou.


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