Fig. 247. Funnelform corolla of a common Morning Glory, detached from its polysepalous calyx.
Polypetalous is the counterpart term, to denote a corolla of distinct, that is, separate petals. As it means "many petalled," it is not the best possible name, but it is the old one and in almost universal use.
Gamosepalous applies to the calyx when the sepals are in this way united.
Polysepalous, to the calyx when of separate sepals or calyx-leaves.
[258.] Degree of union or of separation in descriptive botany is expressed in the same way as is the lobing of leaves ([139]). See Fig. [249]-[253], and the explanations.
259. A corolla when gamopetalous commonly shows a distinction (well marked in Fig. [249-251]) between a contracted tubular portion below, the Tube, and the spreading part above, the Border or Limb. The junction between tube and limb, or a more or less enlarged upper portion of the tube between the two, is the Throat. The same is true of the calyx.
260. Some names are given to particular forms of the gamopetalous corolla, applicable also to a gamosepalous calyx, such as
Wheel-shaped, or Rotate; when spreading out at once, without a tube or with a very short one, something in the shape of a wheel or of its diverging spokes, Fig. [252, 253].
Salver-shaped, or Salver-form; when a flat-spreading border is raised on a narrow tube, from which it diverges at right angles, like the salver represented in old pictures, with a slender handle beneath, Fig. [249-251], [255].