Flaveria trinervia (Spreng.) Mohr  

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  (compositae) ‏Family: Asteraceae
• Arabic Name: Shajaira
• Leaves: opposite, petiolate, ovate, up to c. 10 x 4 cm

‏.prominently trinerved, sharply remote-dentate

•  Tall: A much-branched annual herb up to c. 60 cm 
• Head: very small, 1-5-flowered
• Move: sessile
• shape: aggregated into
  ‏large or small yellow clusters (like compound heads) at the tops of branches
• .Achenes: 2.5 mm long,black, ribbed
• Flowers: single-flowered
  ‏heads female, ligulate, the ligules minute, whitish; one or more of the peripheral flowers of multi-flowered
  ‏.head female, ligulate, others tubular
• Pappus: none
• individual heads: several, clavate, bristle-like scales and several, yellow, keeled scales.
• sex: bisexual
• Distribution: Originally from tropical and subtropical S. America

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  بيان اللقماني