Glossary of "Plant Systematics (1st ed.)" by Simpson (2006)
- The male gametangium of the gametophyte of land plants, producing sperm cells and surrounded by a outer layer of sterile cells, the antheridial wall or jacket layer.
Glossary of "Plant Biology (1st ed.)" by Graham et al. (2003)
- The type of gametangium in seedless plants that produces sperm and is enclosed in a sterile jacket layer of tissue.
- Graham, L. E., Graham, J. M. & Wilcox, L. W. 2003. Plant Biology. -xxxv + 497 pp. Pearson Education, Inc., Upper Saddle River.
- Simpson, M. G. 2006. Plant Systematics. -xi + 590 pp. Elsevier Academic Press, Oxford.