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Horseweed patch from my yard, early May |
Horseweed gets little attention in the foraging community, with no really good reason as to why. It's easy to identify, less bitter than the well-known dandelion or plantain, more flavorful than clover, and provides more food than wood sorrel. Despite this, horseweed is only barely mentioned, while those others are brought up every season.
Horseweed taste; edible and medicinal uses
Horseweed identification
Growth and Stem features
Horseweed grows as a single, straight central stalk, no branching until floweringHairy stalk - Horseweed can grow up to 8 feet tall, but will most often flower between 4 and 5 feet, though you won't want to be harvesting when it gets that old
- When fully grown, the stalk will develop a hollow core, but again, you probably won't want to eat the plant at that stage.
- The stalk is quite hairy, and have shallow vertical grooves or striations running up the whole length
- The leaves grow directly off the stem on slender petioles (leaf stems), no fibrous stems
- The leaves rotate around the stalk as they grow, they do not grow in opposite pairs
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Horseweed leaves | Left: young leaf, still a little rounded Center: assorted mature leaves to show variations Right: leaf detail to show barbs |
Leaf features
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Hairy leaf underside and edges, also note the veins that run parallel to the leaf edge |
- Horseweed leaves are lanceolate, which is to say they are much longer than they are wide; they will become even more so as they age
- Like the stalk, the leaves also have hair, though only on the underside and around the edge of the leaf, not on the top side.
- Horseweed leaves are sometimes described as serrated (like the edge of a saw or a bread knife), but I think this is misleading; rather, they have occasional "barbs" on the leaf edges, anywhere from 2-6 per leaf, (older leaves can have 8)
- These barbs start out as small triangles, but will develop a more fish-hook shape as the leaf ages and grows larger
- One of the best identification features is the randomness of these barbs; almost every leaf will be unique in number of barbs, unique barb positioning, and unique barb size
- All leaves will have prominent veins that run parallel to the central vein, and to the leaf edges; this is easier to see on the underside of the leaves
Flowers
- Before flower buds form, horseweed will start to grow lots of small stems/branches at the top of the stalk. These stems will be 4-12" or so long, and will vary in length with the height of the plant.
- Once these stems form, the plant is no longer good for food as the leaves will become papery and flavorless
- If you are familiar with the aster family as a whole, horseweed has very typical aster flowers - the petals are so narrow they almost appear like hairs or lashes around the bloom
- The petals are white and the centers are yellow
- Each flower is about the size of an American or Canadian dime
- Once bloomed, the flowers will turn into puff heads, similar to dandelion's, but smaller