Sea daffodil (Pancratium maritium): the sea daffodil (Pancratium maritium), which is a bulbous plant with green leaves, white flower, identified with Şile, on the dunes stated, can be observed with its beauty and smell, especially in flowered state, between July and September. The sea daffodil, indicating distribution in the dune areas in the shores of Turkey, however it is started to be endangered gradually, which has a usage potential for also medical purposes, is one of the important bulbous plants of Göksu Delta, with respect to biological diversity. It is a species which is required to be protected and developed with respect to biodiversity. The sea daffodil plant is a species which reached to endangered dimension because a big part of the dune coasts, which are their natural habitats, is used as beach, they are trampled by people, the flowers are plucked for smelling and decorating homes and the bulbs are picked. The sea daffodils, having the property of being an important ornamental plant with scented and decorative flowers, carry the property of being pesticide and medical plant because of more than 150 alkaloids they contain. In a research made in the cancer research institute, Arizona State University, it was found that Pancratistain, which has and anticancer effect is found in Pancratium maritimum.
Şile is a very important county, not only for its sea, but also with the other natural richness it has. The dune system, covering approximately an area of 1 km, extends to the hills next to the Kumbaba hills at the western edge. The wetlands, steep rocks, forest and bush vegetable cover, surrounding the dune system, make contribution to the natural richness of the region. As a result of the researches conducted by DHKD, the Şile-Sahilköy coasts were determined as one of the important plant zones of Turkey. The Şile-Sahilköy coasts host 16 rare plants in total across the country, such that 6 of them are endemic to Turkey. Of them, three [sand pearl (Aurinia uechtritziana), Black Sea cluster (Silene sangaria) and coast ox tail (Verbascum degeni)] are the plants which are required to be put under protection in the scope of the International Bern Convention, signed by Turkey. Kumbaba dune hill and Doğancılı-Alacılı dunes were declared as level I natural sit areas in this region.