SHRUBS, 25 
. Leaves crowded at ends of the twigs. Enkianthus. 
Leaves scattered. 93. 
. Leaves very veiny. Vaccinium. 
Leaves not very veiny. 95. 
. Leaves acute at both ends. Styrax. 
Leaves rounded at both ends. , Andrachne. 
. Bundle-trace one. 96. 
Bundle-traces 3: fruit hard, star-shaped. Exochorda. 
. Twigs fluted: fruit dry. Securinega, 
Twigs not fluted: fruit berry-like. Nemopanthus. 
Toothed. 
. With minute but conspicuous resin-glands. Myrica. 
Leaves at most microscopically glandular. 08. 
. Leaves palmately nerved or triple-nerved. 99. 
Leaves pinnately veined. 102. 
. Pith chambered: fully lignified. Celtis. 
Pith continuous: often dying back in winter. 100. 
. Leaves small (scarcely 5 cm. long). Spiraea. 
Leaves distinctly larger. I0olI. 
. Leaves elliptical-ovate, finely toothed. Ceanothus. 
Leaves rounded, coarsely toothed. Vitis. 
. Buds evidently stalked, or developing the first year 
or producing clusters of flowers. I12. 
Buds not stalked. 107. 
. Leaves 2-ranked. 104. 
Leaves more than 2-ranked. 105. 
. Leaves entire below, crenate above. Fothergilla. 
Leaves crenate throughout. Hamamelis. 
Leaves sharply serrate. Stachyurus. 
. Bundle-trace 1: usually branching the first year. 106. 
Bundle-traces 3: buds distinctly stalked. Alnus. 
. Flowers on glabrate leafy shoots. Styrax. 
Flowers in woolly racemes. Clethra. 
. Pith rather large, star-shaped. 108. 
Pith small if grooved. 109. 
