Tribulus terrestris, commonly known as goatheads or punctureweeds, are considered a noxious weed by some and a valuable medicinal herb by others. The plant is found throughout the United States and drops sharp, pronged seed heads. Although those tough seed pods are often harvested for their fertility -- and libido-boosting substances -- any part of the plant can be used for this purpose. Fortunately for those seeking the valuable weed, it is not in short supply.
Description
Goathead produces a taproot and grows branching stems that radiate from the crown in a wide, spreading fashion. Flowers are yellow and small, and quickly turn into fruit. Each fruit becomes a group of seed pods, which have two or three very sharp and rigid spines. Like many invasive weeds, goathead thrives in poor, dry soil and grows just about anywhere. When the seedpods get scattered, they can be a serious annoyance as they have enough strength to puncture a tire.
Seed Pods
The harvested part of goathead plants are the dried, ripe, green seed pods. They should be collected when they are fully developed, but not yet brown. Using gloves, remove individual seed pods or brush them off with a spatula or other tool. Rinse and dry them out for a few days. Pods are ready when they have a thoroughly dried surface. When harvesting the pods, avoid collecting from areas where animals may have roamed to prevent fecal contamination. Do not collect seed pods with mold or other disease or damage.
Harvesting The Plant
Any part of Tribulus terrestrius is useful for medicinal purposes and contains the valuable phytochemcials. At any stage of growth, you can use the the stems, leaves or any other part of the plant. Propagation is not necessary if you live in regions where the weed is rampant, such as the Southwest. In fact, harvesting the naturally-growing goatheads is a good way to help control the weed, which is considered invasive and noxious.
Medicinal Purposes
Tribulus terrestrius has become widely popular for its purported sexual and athletic-boosting benefits, although these advantages are not entirely proven. It was traditionally used in Chinese medicine as an aphrodiasiac that enhanced testosterone levels. It could improve fertility levels in males, and may boost athletic performance, according to Shawn Talbott and Kerry Hughes, author of "The Health Professional's Guide to Dietary Supplements." The substances responsible are steroidal saponins and protodioscin, which the plant can convert to steroidal hormones. Some athletes and body-builders use supplements containing tribulus terrestrius in hopes of gaining from its alleged testosterone-boosting effects.
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