=K.= Fruit berry-like, black when ripe, small, without calyx, with usually 3 cartilaginous coated seeds 20. _Rhamnus._ =K.= Fruit berry-like, red when ripe, small, without calyx, with usually 4-6 hard-coated, grooved nutlets 18. _Ilex._ =K.= Fruit a small or large apple-like pome, with the seeds in horny cells. (=L.=) =L.= Fruit about ½ in. in diameter, sweet, in drooping racemes 39. _Amelanchier._ =L.= Fruit either sour or much larger, and not in elongated racemes 37. _Pyrus._ =M.= Leaves harsh to the touch; somewhat oblique at base; quite distinctly two-ranked; large trees 74. _Ulmus._ =M.= Leaves decidedly oblique at base; margin wavy; small tree, usually a shrub 40. _Hamamelis._ =M.= Fruit berry-like, ending in a conspicuous spreading calyx; plant generally quite thorny 38. _Cratægus._ =M.= Leaves not regularly oblique at base; plant not thorny. (=N.=) =N.= Leaves thin and light, not harsh to the touch; spray light; bark smooth, in two species somewhat rough on the trunk. (=Q.=) =N.= Leaves thick; edge wavy, almost lobed; fruit an acorn. 88. _Quercus._ =N.= Leaves broad for the length, generally doubly serrate or wavy and serrate; shrubs, rarely tall enough for trees. (=P.=) =N.= Not included in the above. (=O.=) =O.= Leaves 3 or more times as long as wide, widest near the center; fruit a round, prickly bur with 1-3 horny-coated nuts 89. _Castanea._ =O.= Leaves widest near the sharply serrate tip, narrow and entire near the base; fruit small pods in terminal racemes; small tree or shrub 53. _Clethra._ =O.= Leaves widest near the base, usually small; bark scaling off like the Buttonwood; fruit axillary, solitary, small (¼ in.) roundish, dry drupes. A cultivated species, has rather large leaves, widest near the center 75. _Planera._ =P.= Fruit an open oval woody catkin or cone, remaining on the plant through the winter 84. _Alnus._ =P.= Fruit a rounded stony nut, in green leafy edged bracts; shrubs or small trees 85. _Corylus._ =Q.= Usually aromatic; bark dotted on the spray and with horizontal marks on the trunk, peeling off in thin, often papery layers 83. _Betula._ =Q.= Bark not peeling off in thin layers. (=R.=)