|Scientific name:||Conyza bonariensis (L.) Cronquist|
|Synonym name:||Erigeron crispus Pourret|
|Common name:||Flax-leaved Fleabane, Hairy Fleabane, Asthmaweed, South American Horseweed|
|Hebrew name:||קייצת מסולסלת|
|Arabic name:||ازنيوك, KoweenzA|
|Plant Family:||Compositae / Asteraceae, מורכבים|
|Life form:||Therophyte, annual|
|Stems:||Erect; main stems usually branch near the base, lateral stems often taller than the central stem|
|Leaves:||Alternate, entire, narrow lanceolate leaves, coarsely toothed, covered with shoet stiff and long soft hairs; upper leaves are smaller and linear|
|Flowers:||Whitish flower heads; 10-20 disk flowers surrounded by female flowers that appear disklike; phyllaries mostly green or purplish, midveins sometimes brownish, not conspicuously filled with resin, densely hairy|
|Fruits / pods:||Achenes; pappus bristles mostly 3-4mm long, brownish white, often reddish with age.|
|Flowering Period:||April, May, June, July, August, September, October, November|
|Habitat:||Disturbed soils, cultivated areas|
|Distribution:||Mediterranean Woodlands and Shrublands, Semi-steppe shrublands, Shrub-steppes, Deserts and extreme deserts, Montane vegetation of Mt. Hermon|
Derivation of the botanical name:
Conyza, konops (Greek), "a gnat", and used by Pliny as a name for some kind of a fleabane, or konis (Greek), "dust", its powder being used to kill fleas.
bonariensis, named after Buenos Aires, Argentina.
Erigeron, Greek, er, spring; geron, an old man; suggested by the hoariness of some vernal species.
crispus, finely waved; closely curled.