They sprout from apples.
The pear-shaped cashew apple produces cashew nuts. The color of this long fleshy stalk can range from brown to yellow to crimson. The cashew apple is a pseudo-fruit or fake fruit, which implies that the flesh of the fruit is formed from portions of the flower other than the ovaries, such as the base or receptacle. Cashew apple juice is sometimes added to tropical fruit beverages or distilled into liquor.
Nobody expected that the first gravitational waves would be observed from a binary black hole system.