MISSOURI BOTANICAL GARDEN BULLETIN 53 
spines. Leaves ovate, acuminate, gradually narrowed  to- 
wards the base, doubly serrate above, more than half grown 
when the flowers open in the middle of May, at maturity thin 
but firm, blue-green on the upper surface, paler beneath. 
Flowers in compact 3—5-flowered hairy corymbs; stamens 
5-10; anthers pale yellow. Fruit orange-yellow, more or less 
tinged with red. Habitat: on rocky hills and barrens, Frank- 
lin and Taney Counties, Missouri. 
Crataegus neo-Bushii.—A shrub 5-10 feet high. On dry 
gravelly soil, Shannon County, Missouri. 
Crataegus padifolia.—A tree 10-15 feet high. On hillsides, 
Taney County, Missouri. 
Crataegus leioclada.—A shrub 6-8 feet high. On rocky hills 
and barrens, Taney County, Missouri. 
UNIFLORAE GROUP 
Crataegus trianthophora.—A shrub 2-5 feet high. Leaves 
oblong-obovate, cuneate at the base. Flowers in 2—8-flowered 
corymbs; stamens 20; anthers yellow. Fruit light orange-red, 
lustrous, ripening in October. Habitat: in dry open woods, 
Carter County in Missouri, and Arkansas. 
MICRCCARPAE GROUP 
Crataegus Phaenopyrum (cordata), Washington thorn.— 
A tree 20-30 feet high, with a straight trunk dividing into 
slender, usually upright branches, forming an oblong head. 
Branchlets slender, zigzag, bright chestnut-brown, smooth and 
shiny, becoming dark brown or reddish brown, armed with 
slender sharp spines. Leaves broad-ovate to triangular, acute 
or acuminate, square, rounded, or heart-shaped at the base, 
coarsely serrate above, more or less lobed, fully grown when 
the flowers open in late May, at maturity thin and firm, dark 
green and lustrous above, pale beneath. Flowers in many- 
flowered corymbs; stamens 20; anthers rose color. Fruit 
ripening in September and October, persistent on the branches 
nearly all winter. Habitat: along banks of streams in rich 
soil, Franklin, St. Francois, Wayne, Shannon and Ripley 
Counties in Missouri, southern Illinois, Kentucky, Tennessee, 
Virginia, and Alabama. 
Crataegus apiifolia (parsley haw).—A tree 15-20 feet high. 
Along borders of streams and swamps, southeastern Missouri, 
Virginia to Florida. 
