It will be seen by the above enumeration, that in many plants belonging to this division, the pappus is entirely wanting, and in others it will be found to assume a different form to that which it bears in the other tribes. Thus, in the Bur-Marigold (_Bidens_), the pappus consists of from two to five erect awns, which are covered with very small, bent bristles. The genus Senecio has soft, hairy pappus, as may be seen in the common Groundsel (_S. vulgaris_); the leaves of this weed are pinnatifid, and somewhat stem-clasping, and the flowers have no ray florets. In other species of this division, however, the ray florets are very conspicuous: as, for example, in the common yellow Ragwort (_S. Jacobæa_), in the great fen Ragwort, or Bird’s tongue (_S. paludosa_), and in the purple Jacobæa (_S. elegans_). Nearly allied to Senecio, is the genus Cineraria, so much, indeed, that Professor De Candolle, in his late arrangement of the Compositæ, has included the greater part of the species in Senecio. The greenhouse species, with purple flowers, are among those which have been changed; but they will probably always retain the appellation of Cineraria, as an arbitrary English name. The Asters, or Michaelmas Daisies, Golden Rod, Elecampane, Leopard’s Bane, the Cape Marigold, (now called Dimorphortheca, instead of being included in the genus Calendula), Coltsfoot, Wormwood, Southern-wood, Tansy, and many other well-known plants, belong to this division. The Sunflower (_Helianthemum annuus_) is an example of one of the plants belonging to this division which has seeds yielding oil. In this plant the pappus is awl-shaped, and deciduous; and the receptacle, which is broad and somewhat convex, is paleaceous. The seeds are large and oblong, and when pressed, yield a considerable quantity of oil. The Madia is another oil plant; and indeed the seeds of several in this division yield oil. TRIBE IV.—LABIATÆFLORÆ. _Florets bilabiate._