Betelnut Plant Profile
- Description of this palm tree, its stem, leaves and flowers. The palms are cultivated for their stimulating seeds that are typically chewed by millions of people in South and Southeast Asia.
- http://www.plantcultures.org/plants/betelnut_plant_profile.html

Areca catechu
- Photographs and information on the betel nut palm.
- http://www.pacsoa.org.au/palms/Areca/catechu.html

The Betel Palm: Areca catechu
- Photo, botanical description, and uses of the tree whose fruits are called betel nuts.
- http://www.dipbot.unict.it/Palms/Descr10.html