California Palm Tree  

Palms reach 59' (18 m) in height, with tall thin gradually narrowing gray trunks up to 6' (1.8 m) around at the base. Leaf fronds are up to 6' (1.8 m) long, composed of a rounded, fanlike spray of narrow, pointed leaves at the end of each petiole (leaf stem). Fans are 3-6' (91-182 cm) around, and gray-green in color. Old leaves may remain attached indefinitely, forming a “petticoat” that can reach all the way to the ground, held together by threadlike fibers on and between the leaves. Small off-white flowers extend well beyond the foliage. The fruit is blackberries, about ¼" (6.3 mm) in diameter, in clusters of long strings. 

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"The California fan palm is well adapted to hot climate locations in the Inland Empire where it thrives in sun and with normal winter rainfall and low amounts of summer water. Periodic deep watering during summer will sustain robust character. It should be noted there are several winter months when rains can provide sufficient moisture and irrigation is not needed. The high and low range of moisture indicates it can grow with varying amounts of water depending upon exposure conditions and size." 

Source: here