Which weed is identified by its triangular stem?

The identification of a weed with a triangular stem specifically points to yellow nutsedge. This plant is known for its distinct stem shape, which sets it apart from many other weeds. The triangular nature of its stems is a key characteristic that helps in distinguishing it from other grass-like weeds.

In contrast, common dandelion features a round stem with a rosette of leaves at the base, not a triangular stem. Crabgrass has a more typical grass-like appearance with a round stem, while thistle stems are generally more cylindrical and can be spiny but do not exhibit the unique triangular shape that identifies yellow nutsedge. Understanding these morphological differences is critical for accurate weed identification and effective management strategies in landscaping and agriculture.