Conyza bonariensis (L.) Cronquist

Family: Asteraceae, Tribe: Astereae

Pertinent Synonyms & Notes (particularly those used in California; go to GRIN for other synonyms)

Erigeron bonariensis L., E. linifolium Willd.

Pertinent Common Names (particularly those used in California; go to GRIN for other common names)

hairy fleabane, wavy-leaved fleabane

Primary Disseminule Type


Description (diagnostics are in brown)

Fruit a cypsela, narrowly elliptic to oblong, sometimes slightly curved, mildly compressed (1-veined on each edge), cross-section biconvex, 1–1.8 mm long x 0.3–0.4 mm wide x 0.1–0.3 mm thick. Surface sparsely hairy (rarely glabrous), pale tan. Pappus persistent (bristles are easily broken, though not necessarily at their bases), bristles mostly 3–4+ mm long, brownish white to orangish-yellow, often with reddish tips at maturity.

Style base inconspicuous, cylindrical, whitish.

Fruit attachment scar basal, cup-like, whitish.

Similar Species

Similar Species Comparison Chart

Risk Assessment (codes in yellow or red indicate cause for concern; assessments are current as of mid-2011; click AUQP, NZBORIC, or NZBPI for access to the most recent versions of these databases and possible assessment changes)