Capillitium originating from the lower surface of the apical disk of the columella; the threads branched a few times and hanging downward, their extremities free.
"The Myxomycetes of the Miami Valley, Ohio"
A. P. Morgan
On each side of the frenum, under the mucous membrane of the tip, are mucous glands-apical glands-in which cysts sometimes form.
"Manual of Surgery Volume Second: Extremities--Head--Neck. Sixth Edition."
Alexander Miles Alexis Thomson
General color white with a narrow black margin around apical angle of front wings.
"Butterflies Worth Knowing"
Clarence M. Weed