flowering plants, the largest and most diverse group within the kingdom Plantae. Angiosperms represent approximately 80 percent of all the known green plants now living.

The angiosperms are vascular seed plants in which the ovule (egg) is fertilized and develops into a seed in an enclosed hollow ovary.

http://id.loc.gov/authorities/subjects/sh85005034

Zimmermann, Martin Huldrych, Dilcher, David L., Stevenson, Dennis William, Berry, Paul E., Stevens, Peter, Cronquist, Arthur. "angiosperm". Encyclopedia Britannica, 27 Jul. 2026, https://www.britannica.com/plant/angiosperm. Accessed 15 August 2026.