Arnika Potatoes This page first published: Apr 8, 2005 · Updated: May 12, 2018 · by CooksInfo. Copyright © 2021 · This post may contain affiliate links · This blog generates income via ads · Arnika are oval potatoes with yellow skin with netting on it. Inside, the potatoes have fine-textured, dark-yellow flesh. These are waxy potatoes that hold their shape well after boiling, and have good flavour.