This large shrub to small tree has an upright trunk with many thorny branches that form a compact crown. It has dark green ovate leaves and the small fragrant white cup-shaped flowers aappear in a raceme in summer and are followed by eatable fruit.

Hardiness zones 9 to 11

Citrus reticulata (Mandarin) is naturally found in China growing in a wind protected sunny position in well drained fertile moist soil and is frost, wind and drought tender. 

Mandarin is grown for its fruit and bushy habit. It is planted in small gardens as a specimen or along borders for screening. It is also grown in patio tubs or planter boxes and is easily maintained. In cooler areas it is grown as a glasshouse specimen and is fast growing, establishing in 3 to 5 years. It is also planted in sub-tropical gardens and is moderately deer resistant. ID 691

Note:
Tangelo is a cross between mandarin-grapefruit. 

Citrus (SIT-rus) reticulata (ree-tik-U-la’ta)

“Citrus”, from the Latin name for the citron, citron medica, prized for its fruit since biblical times; “reticulata”, from the Latin word meaning “netted”, referring to the veins.

Rutaceae (roo-TAY-see-ee)
Rue and Citrus Family