pencil top
n.— «Most commercial companies over-prune palms leaving fronds with a V-shape referred to as a “hurricane cut.” Constant removal of these leaves will result in a condition referred to as “pencil top” (trunk narrows just below fronds) which makes the trunk area very weak during storms. In addition, the leaves around the center help protect the bud during high winds.» —“Garden Help: Tips for storm-proofing your yard” by Terry Brite Delvalle Jacksonville.com (Florida) Aug. 21, 2009. (source: Double-Tongued Dictionary)