by Jill Henderson
Sweet potatoes are an ancient food crop; a staple that has sustained and nourished mankind for thousands of years. Highly nutritious, sweet potatoes are the seventh most important food crop in the world. Throughout the ages these sweet, orange, red, golden and sometimes white roots were valued so highly by early man, that they were often used as a form of currency and as a token of friendship between cultures. Today, this weirdly-shaped “potato” is making a comeback with gardeners — and for good reason.
To begin at the beginning one must first make note of the fact that sweet potatoes are not Irish potatoes, nor are they yams. Irish potatoes are actually fleshy underground stems (aka tuberous stems) that belong to the nightshade (Solanaceae) family of plants. Other garden nightshades include tomatoes, peppers and eggplant. Yams are a type of tuberous perennial liana belonging to the Dioscoreaceae family. Yams are by far the most notable member of this family. The starchy tubers are the only edible portion of the plant. Raw yams contain measurable amounts of saponins, which can be slightly toxic when eaten in large amounts. Continue Reading →