It is also common in areas of longleaf pine. Longleaf pine forests are rich in biodiversity. The ecosystem of over 98% of eastern savanna areas such as longleaf pine have declined. These forests are distinct from their surrounding habitats, which are often dominated by longleaf pine. Xeric slash pine plantations seem to be preferred over undisturbed longleaf pine habitats. This means that there is only 4% of longleaf pine remaining. Efforts are being made to restore longleaf pine ecosystems within its natural range. Sandhills are woodlands dominated by longleaf pine ("Pinus palustris"). Florida longleaf pine sandhills are often found adjacent to the scrub. The keel of was made from a single longleaf pine log. The seeds of the longleaf pine are edible raw or roasted. Longleaf pine sandhills are woodlands dominated by longleaf pine ("Pinus palustris"). Florida longleaf pine sandhills are woodlands dominated by longleaf pine ("Pinus palustris"). There are 621 species of plants growing in the swamp, including the Longleaf Pine tree. The longleaf pine is the official state tree of Alabama.