One long seed enclosed within the calyx, pentangular, covered with a membranaceous skin.
"The Medicinal Plants of the Philippines"
T. H. Pardo de Tavera
Deviations from the typical form of the sporangia sometimes occur, they are not seldom pentangular, and I have seen the apices quadrangular, with only four threads, or even triangular, and with but three; the threads, too, are said occasionally to branch and anastomose.
"The Myxomycetes of the Miami Valley, Ohio"
A. P. Morgan
They were brown, and pentangular, with a short stem, and slightly punctured at the intersections.
"Sketches of the Natural History of Ceylon"
J. Emerson Tennent