Seeds from this Washingtonia robusta or Mexican Fan Palm. It has a single gray trunk ringed by old leaf bases. The Mexican Fan Palm requires some maintenance to keep its attractive look. Trunk is straight, a little swollen at the base, has no crown shaft, topped with a crown of 20 to 25 large fronds. Leaves are rich glossy green, palmate, or fan shaped, about 5 feet long and 4 feet wide. They have lance shaped leaflets with drooping tips that provide a very tropical appearance to the landscape. The petioles of mature palms are armed with short, sharp thorns. Flowers,Fruits: In the late spring, the Mexican Fan Palm produces small creamy flowers. Flowers grow in clusters on the branched inflorescence 8 to 10 feet long that extends past the leaves. Flowers are followed by black berries, about a half inches in diameter. Fruits are edible, though thin fleshed. They are sweet and taste like dates, can be dried or made into a jelly. Washingtonia robusta is a fast growing palm that can get up to 50 to 60 ft tall and 5 to 10 feet wide, but usually is not taller than 40 feet. Zones 9 to 11.