DICOTYLEDONOUS PLANTS 107 
(b) Carpels 2-seeded (except in some cultivated varieties) ; 
seeds without pulp. Fruit 5-celled. Pyrus, IV. 
(c) Carpels 2-seeded ; fruit.10-celled. Amelanchier, V. 
2. Fruit not evidently a pome or not at all so. 
(a) Trees or shrubs. Fruit appearing like a stone-fruit, with 
a stone usually of 2—5 bony 1-seeded carpels united. 
Crategus, VI. 
(5) Herbs. Fruit consisting of numerous very small akenes 
collected on a fleshy, eatable receptacle. Fragaria, IX. 
(c) Trees or shrubs. Fruit a simple stone-fruit (plum or 
cherry). Prunus, XIII. 
I. PHYSOCARPUS, Maxim. 
Shrubs. Leaves simple, palmately veined and lobed, pet- 
ioled. Flowers white, in terminal corymbs. Calyx spreading, 
5-lobed. Petals 5. Stamens numerous. Pistils 1-5, short- 
stalked, stigma terminal; ovaries becoming inflated at matu- 
rity, 2-4-seeded, splitting open.* 
1. P. opulifolius, Maxim. NineBARK. A spreading shrub 3-6 ft. 
high, the old bark separating into thin strips. Leaves petioled, 
broadly ovate or rounded, often heart-shaped, 3-lobed, the lobes doubly 
crenate-serrate ; stipules deciduous. Corymbs terminal, peduncled, 
nearly globose, downy, many-flowered. Pedicels and calyx nearly 
smooth. Follicles 3-5, much longer than the calyx, smooth and 
shining, obliquely tipped by the persistent style. Banks of streams, 
and often cultivated.* 
Il. SPIREA, L. 
Shrubs with simple leaves. Flowers perfect, in terminal 
or axillary racemes or panicles. Calyx 5-cleft, persistent. 
Petals 5. Stamens numerous. Pistils usually 5, free from 
the calyx and alternate with its lobes. Follicles not inflated, 
2-several-seeded.* . 
1. S. salicifolia, L. W3tLow-LEAFED Sprrea. Shrubs 2-5 ft. 
high, branches smooth; leaves lanceolate to oblong-ovate, smooth 
or nearly so, sharply serrate, base usually wedge-shaped, pale beneath ; 
stipules deciduous; flowers white or pink, panicle dense-flowered ; 
follicles smooth. On low ground.* 
