Glossary of "Plant Systematics (1st ed.)" by Simpson (2006)
- A fruit derived from two or more pistils (ovaries) of one flower. (fruit type)
Glossary of "Plant Biology (1st ed.)" by Graham et al. (2003)
- Fruits formed from a single flower with multiple pistils in which each pistil develops into a fruitlet. Raspberries and blackberries are examples.
- 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.