Rose comprises an outer fleshy layer, the hypanthium, which contains 5–160 "seeds" (technically dry single-seeded fruits called achenes) embedded in a matrix of fine, but stiff, hairs. Rose hips of some species, especially the dog rose ("Rosa canina") and rugosa rose ("Rosa rugosa"), are very rich in vitamin C, among the richest sources of any plant. The hips are eaten by fruit-eating birds such as thrushes and waxwings, which then disperse the seeds in their droppings. Some birds, particularly finches, also eat the seeds. While the sharp objects along a rose stem are commonly called "thorns", they are technically prickles—outgrowths of
Rapa fruit dove Rapa fruit dove The Rapa fruit dove ("Ptilinopus huttoni") is a species of bird in the family Columbidae. It is endemic to French Polynesia. Its natural habitat is subtropical or tropical moist lowland forests. It is threatened by habitat loss. The dove is approximately 31 centimeters tall, a medium sized pigeon. It mainly has green plumage, especially on its wings. Pale blue-green plumage is on the foreparts (head, neck, chest, upper back) shading into green of body above. It also has a yellowish-white tip of tail, not sharply demarcated with right rose crown, face and throat, and a dark rose