Class XII. Order IV. 195 



A small tree, common in mountain woods in the northern parts 

 of New England. It is more slender and irregular in its growth 

 than the cultivated S. aucuparia of Europe. Leaves pinnate, 

 smooth ; leafets oblong-lanceolate, rounded at base, sharply ser- 

 rate, pale underneath. Flowers white, in terminal corymbs. 

 I have not seen it nearer to Boston than Wachusett hill, where 

 it flowers the first of June. 



PEJVTAGYWM. 



202. PYRUS. 



PYRUS ARBUTIFOLIA. Willd. Choke Berry. 



Leaves obovate, acuminate, serrate, downy under 

 neath,, the midrib glandular above ; flowers in corymbs. 



Syn. J\!ESPILUS ARBUTIFOLIA. Lin. Mich. 



JlRONIA ARBUTIFOLIA. PerS. 



A slender shrub. Leaves oblong, oval, or obovate, finely ser- 

 rate, the midrib spotted on the upper side, with small, dark 

 glands. Flowers white, in compound, downy corymbs. Pedun^ 

 cles and calyx more or less downy. Petals roundish, concave. 

 Filaments white, anthers crimson. Germ woolly, styles five, 

 straight; stigmas capitate. Fruit with five cells and ten seeds, 

 of the size of large whortleberries, rough, and astringent to the 

 taste. Low woods and thickets. May, June. 



PYRUS OVALIS. Willd. Swamp Pyriis. 



Leaves oblong, acute, downy when young ; flowers 

 racemed ; petals obovate ; calyx pubescent. 



Syn. MESPILUS CANADENSIS, a.. MX. 



AROHIA OVALIS. Pers. 



This species and the two following were considered by Mi- 

 chaux as varieties only. But though closely allied, they differ 

 considerably in habit. The present is a shrub of moderate size, 

 very common in swamps, and conspicuous for its white flowers 

 in the early part of May. Leaves oblong, serrate, acute, very 

 downy and whitish underneath when young, but glabrous when 

 old. Flowers in long racemes, the pedicels and germs downy, 

 the tips of the calyx smooth. Petals oblong-obovate. Fruit dark 

 blue, of the size of whortleberries, pleasant to the taste, ripe in 

 June. 



