Fig. 1.

The seeds of Momordica charantia, with those of the TR group on the Left, those of var. muricata in the Middle, and those of var. charantia on the Right. (Scale bar: 1 cm.) The seeds TR-8 are from wild Tanzanian material, while the remaining TR seeds are from Thailand (TR-2, TR-4, and TR-5), China (TR-9 and TR-10), Taiwan (TR-3), the Philippines (TR-1), and Columbia (TR-6 and TR-7). The seeds in the Middle are mostly from India and Nepal, except for Mu-8, Mu-9, and Mu-10 from Thailand, Vietnam, and China. The seeds on the Right are from India, Vietnam, China, and the Philippines, and Ch-7 is from cultivated Tanzanian bitter gourd plants. Reproduced from ref. 2, which is licensed under CC BY 4.0.