Several lateral roots branched from the tap root. The lateral roots were smaller in diameter and seldom developed below a soil depth of 10 inches. The average depth of lateral root development was 3 to 4 inches. Lateral roots were found as shallow as 0.25 inches. New plants arise from the vegetative buds, which develop on the root stocks, thus contributing to the spread of woollyleaf bursage.
Tillage also can redistribute vegetative buds, aiding the spread of woollyleaf bursage.
Shoots of woollyleaf bursage will grow from root buds, emerging during April. During late July or early August, woollyleaf bursage flower development begins. A single flowering stalk may protrude from each stem. Inconspicuous, greenish-gray male flowers are borne on the tip and upper portion of the flowering branch. One to several greenish-gray female flowers are borne in the upper leaf axils, further down the stem than the male flowers.