[f. EPI- + SPORE. In mod.L. episporium.] The outer membrane or covering on the spore of a lichen or fern.
1835. Lindley, Introd. Bot. (1848), II. 128. The membrane by which it [the spore] is covered … soon distends into a transparent Epispore.
1874. Cooke, Fungi, 60. This rosy colour … accumulating exclusively upon the epispore.
