Citrofortunella mitis (calamondin / panama orange) - The result of a cross between Citrus reticulata and a Fortunella species, this plant is grown mostly as an ornamental with its many showy, bright orange fruit.  These fruit can be eaten though they are rather sour when fresh.  Both the flesh and the skin are good for use in marmalades.  Hardy in zones 8 - 10.

Citrofortunella mitis 'Variegata' - A beautifully variegated form of calamondin with showy, white, gray and green mottled leaves and white striped fruit.  Highly ornamental!

Citrus aurantiifolia (lime) - This citrus is better known as a lime.  It is, naturally, the source of lime oil.  The plant makes a small, evergreen tree from 9 to 15 feet tall.  The fruit are green tinged yellow when ripe, have a very thin skin and a very sour pulp.  This native of India and southeastern Asia is hardy in zones 9 and 10.

Citrus aurantiifolia 'Key' (key lime / mexican lime / bartender's lime) - A small growing citrus from 10 to 12 feet tall that is suited to pot culture or outdoor use in warm areas.  The small, intensely aromatic fruit are in demand for mixed drinks and culinary uses as indicated by one of its common names.  It does better in areas which receive long, warm summers and frost free winters.

Citrus aurantiifolia 'Tahiti' (tahiti lime / persian lime) - The medium sized fruit are relatively free of seed.  The growth habit is similar to that of a lemon and the plant reaches an ultimate height of 8 to 10 feet.  Its heaviest bearing season is in the summer but it produces fruit practically year around.  Because of its splendid flavor, this cultivar is the lime of commerce and is best for use in making ades.

Citrus limon (lemon) - As the name would indicate, this is the lemon.  It is the source of lemon oil as well as the source of lemon juice.  The large, white blossoms are intensely fragrant and are produced virtually year around.  This plant is a native of southeastern Asia and is hardy in zones 9 and 10.

Citrus limon 'Variegated Pink Eureka' - This is a beautifully variegated form of lemon with mottled leaves and fruit.  It flowers practically year around and likewise, bears fruit year around.  These fruit are different because of their delightful, pink flesh.

Citrus meyeri 'Improved Meyer' (meyer lemon / chinese dwarf lemon / dwarf lemon) - This improved version of a very old, dwarf lemon cultivar grows beautifully in containers as well as outdoors in mild climates.  On its own roots, it grows to about 12 feet tall and 15 feet wide.  It produces large, fragrant, white flower clusters and delicious, golden yellow fruit year around.  This is one of the hardiest cultivars of lemon available.  It also has more resistance to disease infection and viruses than the original 'Meyer' lemon.  Brought into the United States at the beginning of the 20th century from China, it is thought by some to be a hybrid between a lemon and an orange.  Zones 8 - 10.

Citrus paradisi (grapefruit) - A hybrid produced by crossing Citrus maxima and Citrus sinensis.  This is what is commonly called a grapefruit.  It is an evergreen tree from 15 to 20 feet tall.  The fragrant, white flowers are produced in clusters as are the large, yellow to yellow-orange fruit.  Hardy in zone 10 and into the warmer parts of zone 9.

Citrus paradisi 'Ruby Red' (pink grapefruit) - A large, seedless grapefruit with deep, rose pink to reddish flesh.  It is a very tasty and popular table grapefruit.  Hardy in zones 9 and 10.

Citrus ponderosa (wonder lemon / american wonder lemon / giant lemon) - A dwarf (8 to 10 feet tall) but vigorous growing lemon that is well suited for pot culture.  The exceptionally large, softball sized fruit are produced all year long as are the large, waxy, fragrant, white flowers.  The fruit are great conversation pieces and may easily get over 2 pounds in size and some even maxing out at 5 pounds.  Quite impressive!

Citrus reticulata (mandarin orange / satsuma orange / tangerine) - Small, evergreen trees that bear the common oranges purchased in supermarkets worldwide.  The fruit are orange-yellow to deep orange-red and about 3 inches in diameter.  The segments separate readily from one another and from the smooth, thin skin.  The pulp is very sweet.  Natives of southeastern Asia and hardy in zones 8 - 10.

Citrus reticulata 'Owari' (owari satsuma) - This fine, tasty satsuma is considered the best of those sweet, "kid glove" oranges that peel so easily.  These satsumas are practically seedless and ripen early in the fall.  These are among the hardiest of the commercially available citrus.  They are spreading in habit and usually grow up to 10 or 15 feet tall.

Fortunella crassifolia (meiwa kumquat / round kumquat / sweet kumquat) - This is the sweet, round kumquat that is so popular on the Gulf Coast.  It makes a fine pot plant or orchard specimen.  The kumquats are much hardier than oranges, satsumas, grapefruit, et cetera.  The attractive, aromatic fruit are used for preserves or the whole fruit may be eaten fresh.  The flowers are fragrant as is the foliage if bruised.  This species is probably native to southern China and is hardy in zones 8 -10.

Fortunella margarita (oval kumquat / nagami kumquat / sour kumquat) - A showy, elongated, edible fruit with a sweet skin and a pleasingly sour pulp.  The overall flavor is delicious and the fruit are quite juicy.  The flowers are small, white and very fragrant.  This is one of the hardiest of the kumquats and our favorite.  The attractive, aromatic fruit are used for preserves and the whole fruit may be eaten raw.  It is probably native to southeastern China.  Hardy in zones 8 - 10.