50 MISSOURI BOTANICAL GARDEN BULLETIN 
PRUINOSAE GROUP 
Crataegus calliantha—A shrub 5-10 feet high, with small 
erect stems covered with dark rough bark. Branchlets slen- 
der, nearly straight, dark orange-green at first, becoming 
light orange-brown and lustrous the first season and dark 
chestnut-brown the following year, and armed with numerous, 
nearly straight, stout, dark brown spines. Leaves ovate, 
acuminate, rounded at the broad base, sharply serrate and 
slightly divided above the middle, about half grown when 
the flowers open late in April, at maturity thick, yellow-green, 
lustrous and smooth above, paler beneath. Flowers white, 
in compact 5-7-flowered corymbs; stamens 20; anthers pale 
pink. Fruit pink. Habitat: on limestone hills, St. Louis 
and Franklin Counties, Missouri. 
Crataegus bracteata.—A shrub 6-9 feet high. On bottom 
lands, Jasper County, Missouri. 
Crataegus rubicundula.—A shrub 5-10 feet high. In river 
bottoms, St. Louis County, Missouri. 
Crataegus decorata.—A shrub 8-12 feet high. On rocky 
hillsides, Taney County, Missouri. 
Crataegus platycarpa.—A tree 15-20 feet high. On dry 
ridges between swamps, Butler County in Missouri, and Ar- 
kansas. 
Crataegus aspera.—A shrub 10-12 feet high. On gravelly 
banks of streams, Jasper County, Missouri. 
Crataegus magnifolia—A shrub 10-12 feet high. On gravy- 
elly banks of streams, Jasper County, Missouri. 
Crataegus patrum.—A tree 15-20 feet high. On river bot- 
toms, St. Louis County, Missouri. 
Crataegus aperta.—A shrub 10-15 feet high. On rocky 
hills, St. Louis County, Missouri. 
Crataegus callicarpa.—A tree 15-20 feet high. On hillsides, 
St. Louis County, Missouri. 
Crataegus locuples—A tree 15-20 feet high. On wooded 
hillsides, St. Louis County, Missouri. 
Crataegus Mackenzii—A shrub 6-15 feet high. On rocky 
barrens, Jackson County, Missouri. 
Crataegus rigida.—A shrub 9-12 feet high. In oak woods 
on limestone hills, Franklin County, Missouri. 
