Seriphus, = A small and unimportant island, one of the Cyclades, now Seriphos.
seriph, = old French, obscure origin. One of the fine cross-strokes used at the top or bottom of a letter. (BL, Ox)
virga, = a slender green branch, a twig, sprout, switch, rod;
(slender green branch, twig, scion, stripe)
-atus, = indicates possession or likeness.
virgatus, = made of twigs or osiers.
(twiggy, long and slender, or streaked, rod-like)