88 ROSACEAE, 
PLATANuS, Sycamore. Buttonball. 
Deciduous trees with exfoliating bark while young; light 
brown rather firm wood with minute diffused ducts and close 
and rather thick medullary: rays; moderate usually elongated 
roundish twigs; roundish continuous browning pith; somewhat 
raised 2-ranked nearly annular crenulate leaf-scars encircling 
the ovoid sessile 1-scaled buds and with about 7 bundle-traces; 
narrow stipule-scars encircling the node; no terminal bud; 
broadly ovate mostly palmately 3- or 5-lobed and coarsely and 
acutely toothed petioled leaves; and small monoecious flowers 
and very small dry plumed fruits in large globose long-stalked 
aggregates. 
I. Fruit aggregates solitary: stipules large toothed. 2. 
Fruit aggregates usually 2. P. acerifolia. 
Fruit aggregates usually 3 or 4: stipules subentire. 5. 
. Tree ovoid. 3. 
iS) 
Tree oblong. d P. occidentalis pyramidalis. 
3. Leaves green. P. occidentalis. 
Leaves variegated. 4. 
4. Leaves white-blotched. P. occidentalis Suttneri. 
Leaves yellow-blotched. P. occidentalis aureo-variegata. 
5. Leaves moderately lobed. P. orientalis. 
Leaves deeply lobed. P. orientalis digitata. 
Family ROSACEAE. Rose Family. 
A large and very heterogeneous family yielding the most 
important fruits of temperate regions, e.g. strawberries, rasp- 
berries, blackberries, apples, pears, peaches, plums, apricots, cher- 
ries: including many shrubs indispensable in landscape work. 
PuHysocarpus. Ninebark. 
Deciduous shrubs with exfoliating bark; moderately slen- 
der twigs decurrently angled or grooved below the nodes; 
roundish continuous pith; alternate raised often 3-lobed leaf- 
scars with 3 bundle-traces; decurrent stipule-scars; ovoid sessile 
rather spreading buds with about 5 exposed scales; ovate more 
or less 3-lobed irregularly crenately toothed petioled leaves ; 
