Olea europaea 'Arbequina' is a popular Spanish olive variety that offers delicious fruit and oil.

Olea europaea 'Arbosana' makes for an excellent table olive or a rich, fruity, delectable oil with a lovely mild flavour.

Olea 'Chemlali' is a popular Tunisian olive that offers delicious fruit and oil. It is cold tolerant and self-fertile.

Olea europaea 'Coratina' is an Italian olive considered a rustic varietal with moderate vigor and a dense canopy. Use for fruit or oil.

Olea europaea 'Frantoio' along with 'Leccino' are the two principal olive cultivars of Tuscany.

Olea europaea 'Koroneiki' is from the Peloponnese area of Greece and produces small olives that yield exceptional oil.

Olea europaea 'Leccino' is thought to be the hardiest of all olives.

Olea europaea 'Manzanillo' is a the most important Spanish olive. It originated near Seville.

Olea europaea 'Pendolino' is an old Italian variety with nice pendulous branches and high fruit production.

Olea europaea 'Picholine' is the most widely available cultivar in France used for cocktail olives and olive oil.

Olea europaea 'Taggiasca' is the most common variety grown in Liguria, Italy along the Mediterranean adjacent to France.

Olea 'Universal' hails from the Ukraine where it is valued for its large fruit and their high oil content.

Onoclea sensibilis is a large, deciduous sensitive fern with long-stalked, deeply pinnatifid, bright green, fronds.

Osmanthus fragrans f. aurantiacus has small, orange, extremely fragrant, edible flowers famous in China for use in teas and other foods.

Osmanthus fragrans f. thunbergii has small, pale yellow, extremely fragrant, edible flowers famous in China for use in teas and other foods.

Othonna capensis or little pickles is an extremely hardy South African groundcovering succulent with blue-green leaves and yellow daisy flowers.