Eclipta prostrata (L.) L.
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Authority
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.
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Family
Asteraceae
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Scientific Name
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Description
Species Description - Weak or spreading, strigose annual, often rooting at the nodes; lvs lanceolate or lance-elliptic to lance-linear, acute, narrowed to a sessile or shortly petiolar base, remotely serrulate, 2–10 cm × 4–25 mm; heads 1–3 in terminal or axillary clusters on the many branches, the disk 4–6 mm wide in fl; invol bracts, or some of them, usually a little exceeding the disk; rays whitish, minute; achenes 2–2.5 mm, rugose or warty, slightly hairy above; pappus a nearly obsolete crown well removed from the margins of the truncate-topped achene; 2n=22. A weed in bottomlands and muddy places, native to the New World, now pantropical, and n. in our range to Mass., s. Ont., and Wis. Aug.–Oct. (E. alba; E. erecta; Verbesina a.)
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Common Names
yerba de tajo