The mature seed of Ginkgo biloba L. (Fam. Ginkgoaceae).
Mainly in Chinese provinces such as Guangxi, Sichuan, Henan, Shandong, Hubei, Liaoning and Jiangsu.
Harvest & Processing
Harvest seeds in late autumn after they ripen; remove fleshy exotesta; wash clean; dry under the sun; break shells to get kernels.
Seed with exotesta removed: Ovoid (egg-shaped) or ellipsoid (elliptical in long-section and circular in cross-section); 1.5-3 cm long, 1-2.2 cm wide. Outer shell (i.e. mesosperm) bony, smooth; outer surface yellowish-white or pale brownish-yellow; base with an orbicular (round) punctiform (dot-like) protuberance; margin with 1 ridge on each side, occasionally with 3 ridges. Endotesta membranous, dull reddish-brown or pale yellowish-brown; kernel flattened and spherical, pale yellowish-green; endosperms plump, starchy, with clefts in the centre; embryo extremely small. Odourless; taste: slightly sweet, bitter.
1. Cough and dyspnoea
2. Leukorrhagia, white and turbid urine, urinary frequency, nocturnal emission
Contains ginkgotoxin, ginkgolic acid and bilobol.
The information and images in this Online Herbal Exhibition is form the book, "An Illustrated Chinese Materia Medica in Hong Kong", edited by Professor Zhao Zhongzhen, School of Chinese Medicine, Hong Kong Baptist University. For the complete collection of Chinese Materia Medica compiled by Professor Zhao, please go to this website: http://www.bucmm.org.