Madagascar Periwinkle (Catharanthus roseus) is perhaps the most well-known case where a medicinal herb (used traditionally for treating diabetes and infections) was adopted by allopathic medicine. It was discovered that compounds from the milky sap of the plant (vincristine and vinblastine) prohibit proliferation of white blood cells, leading to their use in treating leukemia and lymphoma. Survival rates of patients suffering from these diseases have improved significantly with the use of compounds from this little flower. I encountered her first in the wild on the shores of Zanzibar, and indeed the plant may be found throughout the islands and shores of East Africa, although the origin is considered to be Madagascar. When speaking to local people, I was told the plant does not make seed, and although this is incorrect, I can see why they thought so. The green follicles tend to harbor only a few seeds, and fall prematurely from the plant. You can see the mature seeds inside the green capsule in my first photo. This is one of the most painstaking plants to cultivate for seed, and I'm happy to be able to offer, once again, seeds at www.strictlymedicinalseeds.com. Observation is the key!