Pineapples have the shape of a pinecone, and can reach up to 30 centimeters in length. They have a rough, waxy, hexagonal-patterned rind that is covered in small, soft spikes and topped with a compact grouping of narrow, green, pointed-tipped leaves that extend upright. The rind can range in color from green to yellow or reddish-orange when ripe. The flesh varies in shades of white or yellow, depending on the variety, and modern cultivated varieties are known to be seedless. The loosely fibrous and juicy flesh offers a sweet flavor with mild acidity, while the edible core is firmer, more leathery, and less sweet.