《管子·地员》
这里的榆、柳、桑、柘、栎、槐、杨等等，各种树木的生长，快而且大，其枝条直而且长。
其榆其柳，其檿其桑，其柘其栎，其槐其杨，群木蕃滋数大，条直以长。
The growth of various trees here, such as elm, willow, mulberry, catalpa, oak, locust, poplar, etc., is fast and large, and their branches are straight and long.