There are exquisite gypsum rosettes and intricately involved helictites.
Some are globular and others are rod-shaped; they may be grouped in clusters, stars, rosettes, rows, chains or swarms of indefinite shape.
This is decorated with circles of rosettes of blue, green and red enamel, each surrounded by lines of gold; within the circles are little figures evidently suggested by antique originals, and precisely like similar figures found on carved ivory boxes of Byzantine origin dating from the II th or 12th century.
The so-called water cabbage (Pistia Stratiotes) is a floating plant widely distributed in the tropics, and consisting of rosettes of broadish leaves several inches across and a tuft of roots hanging in the water.
The fleshy leaves are often reduced to a more or less cylindrical structure, as in the stonecrops (Sedum), or form closely crowded rosettes as in the house-leek (Sempervivum).