Appearance
Hairy leafcup is 0.6 to 3.0 m tall. The stem is stout and generally smooth below the inflorescence branches. The opposite leaves form a small cup around the stem and hence the name leafcup. Each head has 7 to 13 yellow, 1 – 2 cm long ray flowers to the outside, and 40-80 or so yellow tube-like disc flowers to the inside. A single large plant may produce one hundred or so heads. The entire plant has a resinous odor.The species was formerly named ''Polymnia uvedalia'' Linnaeus.
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