In addition to the terminal umbels, 1-2 axillary umbels of flowers may develop from the axils of the upper leaves, although this is uncommon. The peduncles of these umbels are light green to purplish green and short-pubescent. Individual umbels of flowers span about 2-3" across, consisting of 15-35 flowers; the umbels are dome-shaped to nearly globoid. The flowers are usually densely arranged within the umbels, although in shaded situations the umbels can be more open.