98 FLORA OF MOUNT DESERT. pink, cinnamon-scented, mostly double, not showy. Gray, Field, For. & Gard. Bot., 127. Roadside, escaped from gardens. Hulls Cove; Oak Hill (Rand). Introduced from Europe. PYRUS, L. APPLE. PEAR. 157 P. MALUS, L. APPLE. Infrequently spontaneous by waysides, in old fields, etc. Northeast Harbor; Somesville; Canada Valley; Sutton Island (Rand). 158 P. arbutifolia (L.), L. f., var. melanocarpa (Mx.), Hook. BLACK CHOKEBERRY. Common in both wet and dry ground. Very variable in height from 4°-5° in swamps to 6'-1° on mountains. A double- flowered form, Breakneck Ponds (Rand). 159 Forma pubescens. Pedicels and petioles very tomentose. Not uncommon. Somesville (R. & R., M. L. Fernald);—Bar Harbor (Mary Minot). 160 P. Americana (Marsh.), DC. MOUNTAIN ASH. Rocky woods; common. Leaves commonly less taper-pointed, and a darker green in color than farther south. Somewhat ap- proaching the next in general appearance. 161 P. sambucifolia, Cham. & Schlecht. NORTHERN MOUNTAIN ASH. Rare. Beech Cliff (E. Faxon);—Southwest Harbor (M. L. Fernald;—Beech Hill (Rand). CRATÆGUS, L. HAWTHORN. THORN. 162 C. coccinea, L. SCARLET-FRUITED THORN. Infrequent. Little Harbor Brook Notch (Rand);—Denning Brook (M. L. Fernald). 163 Var. macracantha (Lodd.), Dudley. Frequent by waysides, rocky banks, beaches, etc. The com- mon Thorn of the Island.