These seeds were collected from Phoenix paludosa, also known as Mangrove Date Palm, and Sea Dates. This palm tree likes to live in full sun to partial shade where it can grow up to about 15 feet tall. The dark fruits range from purple to black and are used to make a coffee substitute, or boiled and used in curries. The pith from the inside of the stem can be removed and eaten. The palm heart is delicious and can be eaten raw or cooked. USDA Hardiness Zones 10 to 11.