The plants belonging to this division are rarely seen in British gardens; but when they do occur, they are well worth examining, from the singularity of their formation. _Mutisialatifolia_ (see fig. 46) has a large, woolly involucre, the scales of which are of two kinds, the outer ones, (_a_), being pointed and leaf-like, and the inner ones, (_b_), having the appearance of scaly bracts. The florets of the ray, (_c_), are narrow, and spreading in the fully expanded flower; and those of the disk, (_d_), are shorter, erect, divided into two lips, which curl back, and the lower one of which is again divided into two segments (as shown at _e_ in the detached floret). The leaves of this plant are very curious; the midrib is lengthened and drawn out into a tendril, as shown at _f_, and the petiole (_g_) is decurrent. There are several other genera belonging to this tribe, but none of them are particularly ornamental except _Triptilion spinosum_, which has flowers of the most brilliant blue, that do not lose the intensity of their colour in drying. [Illustration: FIG. 46.—FLOWER AND LEAF OF MUTISIA LATIFOLIA.] CHAPTER VII. THE ORDER ERICACEÆ: ILLUSTRATED BY THE COMMON OR BESOM HEATH, THE MOOR HEATH, CAPE HEATHS, LING OR HEATHER, ANDROMEDA, LYONIA, ST. DABÆOC’S HEATH, ARBUTUS, THE BEARBERRY, GAULTHERIA, CLETHRA, RHODODENDRON, INDIAN OR CHINESE AZALEAS, YELLOW AZALEA, AMERICAN AZALEAS, RHODORAK, ALMIA, MENZIESIA, LOISELEURIA, LEDUM, LEIOPHYLLUM, THE BILBERRY, THE WHORTLEBERRY, THE CRANBERRY, PYROLA, AND MONOTROPA.