biofuel

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  • Grindelia squarrosa / Curly cup gumweed

    • small-ish yellow flowers
    • button-like buds
    • attractively compact, globe-shaped plant

  • Thlaspi arvense / field pennycress

    • inflorescence a raceme with white, teeny flowers
    • oval seed pods ca. 1/3" across
    • blooms late spring and summer
    • continues blooming as pods fill from older flowers
    • common weed in disturbed habitats including cultivated land

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