Azollaceae

Directory

References

Discover

Flags of the countries of the world (flagpoles).

How Many Countries Are There in the World?

Secret Service Agent Listens To Earpiece

Secret Service Code Names of 11 U.S. Presidents

Several red apples with cut apple in the foreground.

Can Apple Seeds Kill You?

Cheetah (Acinonyx jubatus) standing on rock, side view, Masai Mara National Reserve, Kenya

The Fastest Animals on Earth

A Factory Interior, watercolor, pen and gray ink, graphite, and white goache on wove paper by unknown artist, c. 1871-91; in the Yale Center for British Art. Industrial Revolution England

Inventors and Inventions of the Industrial Revolution

Shadow of a man holding large knife in his hand inside of some dark, spooky buiding

7 of History's Most Notorious Serial Killers

Queen Elizabeth II addresses at opening of Parliament. (Date unknown on photo, but may be 1958, the first time the opening of Parliament was filmed.)

All 119 References in “We Didn’t Start the Fire,” Explained

Azollaceae

plant family

Learn about this topic in these articles:

annotated classification

In fern: Annotated classification
…treated as separate families (Azollaceae and Salviniaceae), Azolla (about 6 species) and Salvinia (about 10 species), of floating aquatics, distributed nearly worldwide but most diverse in the tropics. Family Marsileaceae (clover ferns) Plants heterosporous; rhizomes
Read More