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'''Olive leaf''' is the leaf of the olive tree (Olea europaea). Although olive oil is well known for its flavor and health benefits, the leaf has been used medicinally in various times and places. Olive leaf and olive leaf extracts (OLE), are now marketed as anti-aging, immunostimulator, antioxidant, cardio protective, blood sugar regulating, anti-inflammatory and antibiotic agents.  

The typical olive glucosides, oleuropein and demethyloleuropein, and their derivatives was clarified. It appears that the strong chemotactile repulsive effect exerted by the water fraction of crushed olives is due mainly to (E)-2-hexenal.<ref name="chemical composition"/>

{{Fruit||7–10 mm (0.28–0.4 in.) long pome|clearly Clearly grooved lengthwise, Lowest hooked hairs aligned towards crown|With hooked hairs|}}

Landscape Uses:Container, Espalier, Pollard, Standard, Specimen, Street tree. Easily grown in a loamy soil[1] and tolerating infertile soils[200], it prefers a well-drained deep fertile soil.<ref name="How to plant/cultivate"/>

{{Commonly seen|Woods and scrub in dry Dry rocky places}}.

<ref name="chemical composition">[https://www.ncbi.nlm.nih.gov/pubmed/24242710 "Olea europaea chemicals"Chemicals]</ref>

<ref name="Leaf">[https://web.archive.org/web/20131226161459/http://www.wildflowers-guide.com/39-agrimony.html "wayback Wayback machine"]</ref>

<ref name="How to plant/cultivate">[https://www.pfaf.org/user/Plant.aspx?LatinName=Olea+europaea "Cultivation details"]</ref>