_Menziesia_ is a genus containing only three species, of which _M. pilosa_ (_fig._ 60) may be taken as an example. The flowers are small and bell-shaped, and the anthers (_a_) are without any awns or bristles; there are eight stamens, and the curious manner in which they are crowded round the style is shown at _b_. The capsule is four-celled. [Illustration: FIG. 60.—FLOWERS, ANTHERS, AND PISTIL OF MENZIESIA.] _Loiseleuria_, or _Azalea procumbens_, is a small plant, having the appearance of thyme, which is the only species left in the genus Azalea by those botanists who include the true Azaleas in the genus Rhododendron. _Ledum_ is the last genus belonging to this tribe that I shall attempt to describe. _Ledum palustre_, or wild Rosemary, the best-known species, has a corolla in five regular petals, and ten stamens which project beyond it; but _L. latifolium_, the Labrador Tea, has only five stamens, which are not longer than the petals. _L. buxifolium_, a little thyme-like shrub, is now called _Leiophyllum thymifolium_. All the species have white flowers. TRIBE III.—VACCINIEÆ. [Illustration: FIG. 61.—COMMON BILBERRY (_Vaccinium tenellum_).] The plants comprised in this tribe, which is considered a separate order by many botanists, all agree with the genus Vaccinium in having the ovary entirely surrounded by the calyx, which forms a fleshy berry-like fruit when ripe, and in the seeds being scaly. _Vaccinium Myrtillus_, the common Bilberry or Blaeberry, is a familiar example of the genus; and _fig._ 61 shows the shape of the flowers at _a_, the manner in which the ovary is enveloped in the calyx at _b_, and the curious shape of the anthers in the magnified representation of them at _c_. The berry is five-celled and many-seeded; and there are eight or ten stamens. Both the anthers and the flower vary in the different species, but the calyx and the manner in which it surrounds the ovary are nearly the same in all, as may be seen in _fig._ 62, which represents a specimen of _V. tenellum_, the Pennsylvanian Whortle-berry. In this figure _a_ is the flower, _b_ the anther, and _c_ the ovary surrounded by the calyx. [Illustration: FIG. 62.—AMERICAN WHORTLE-BERRY (_Vaccinium pennsylvanicum_).] There are many species, among which may be mentioned the American Bluets (_V. angustifolium_); Deerberries (_V. stamineum_); Bluetangles (_V. frondosum_); the Hungarian Whortle-berry (_V. Arctostaphylos_); and the Cow-berry, or common British Whortle-berry (_V. Vitis-Idæa_). [Illustration: FIG. 63.—CRANBERRY.] The Cranberry (_Oxycoccus palustris_) differs from the genus Vaccinium in the shape of its flowers (see _fig._ 63), and in its anthers being without spurs; there are eight stamens, the filaments of which are connivent, that is, growing close together. The American Cranberry (_O. macrocarpus_) differs from the European kind, principally in having larger fruit. TRIBE IV.—PYROLEÆ.