CRAB APPLE. 
Natural Order , Rosacea:, ( sub-order , Romeo:, Juss.) Lin- 
ncean Classification , Icosandria, Pentagynia. 
PYRUS, (Linn.) 
Calyx tube urceolate, adnate to the fleshy ovary, from which it 
is inseparable, with the border 5-lobed. Petals 5, roundish, 
concave, on short claws. Styles usually 5 or less, distinct or 
conjoined at the base. Pome (or apple) fleshy, closed, inter- 
nally 5-celled, the cells cartilaginous and 2-seeded. The seeds 
with a chartaceous coat. 
Trees or shrubs (in the present section) with entire or pal- 
mately lobed, serrated leaves. Flowers in terminal flattish clus- 
ters or corymbs. Fruit edible when not too acerb or astringent. 
RIVER CRAB APPLE. 
PYRUS rivularis, foliis ovatis acutis indivisis junioribus 
trilobatis incisis argute serratis subtus pubes cent ibus, 
stylis (3-4) basi coalitis glabris , fructibus perparvis sub - 
globosis vix umbilicatis , l obis calicinis demum deciduis. 
Pyrus rivularis . Douglas in Hook. Flor. Bor. Am., vol. 1. p. 
303. tab. 68. Torrey and Gray, Flora N. Amer., vol. 1. p. 
471. 
Pyrus diver sifolia, Bongard. Veget. Sitcha. 1. c. p. 133. 
This elegant species of Pyrus is common throughout 
all the lower or maritime portion of the Oregon terri- 
tory, and it uniformly affects the shade of rich alluvial 
forests near the lesser streams and ponds. It becomes 
