Nice description, but a good picture is worth 1,000 words.

What area are you in?

You can look up weed and plant images by state or province at the EWIRM
database located at the World of Weeds www.ergonica.com.

Many of these references allow you to identify plants by selecting key
features, instead of viewing hundreds (thousands) of photos.

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EWIRM: Nature makes plants, humans make weeds!