COCO DE MER or DOUBLE COCO-NUT, a palm, Lo doicea Seycliellarum, a native of the Seychelles islands. The flowers are borne in enormous fleshy spadices, the male and female on distinct plants. The fruits, among the largest known, take ten years to ripen ; they have a fleshy and fibrous envelope sur rounding a hard nut-like portion which is generally two-lobed, suggesting a double coco-nut. The contents of the nut are edible. The empty fruits (after germination of the seed) are found floating in the Indian ocean, and were known long before the palm was discovered.