Hitchhikers...Bah Humbug!
Of course, I dug further and found this web site...Ultimate Hitchhiker which had this cool chart to help decipher varieties. I never knew there were so many but I'm glad that I don't have them all here!!
A. Burdock (Arctium lappa, Asteraceae); B. Grappling-hook (Harpagonella palmeri, Boraginaceae); C. Horehound (Marrubium vulgare, Lamiaceae); D. Bur-grass (Cenchrus echinatus, Poaceae); E. Bur-clover (Medicago polymorpha syn. M. hispida, Fabaceae); F. Beggar-ticks (Bidens pilosa, Asteraceae); G. Sand-bur (Ambrosia acanthicarpa, Asteraceae); H. Cocklebur (Xanthium strumarium, Asteraceae); I. Krameria (Krameria grayi, Krameriaceae); J. Stick-tight (Desmodium cuspidatum, Fabaceae); K. Devil's-claw (Martynia annua, Martyniaceae).
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