46 MISSOURL BOTANICAL GARDEN BULLETIN 
CRUS-GALLI GROUP 
Crataegus efferta—A tree 15-18 feet high, with a tall trunk 
covered with a lght red-brown scaly bark. Branches large, 
spreading, forming a broad flat-topped head; branchlets stout, 
nearly straight, light orange-green at first, becoming hght 
olive-green at the end of the first season and dull gray-brown 
the following year, armed with stout, straight or slightly 
curved, chestnut-brown spines. Leaves oblong-obovate, acute 
or rounded at the apex, gradually narrowed to the slender 
coneave-cuneate base, serrate above the middle, nearly full 
grown when the flowers open in early May, dark yellowish 
green on the upper surface, pale bluish green beneath. 
Flowers white, in 10—-12-flowered corymbs; stamens 10; 
anthers pale yellow. Fruit lustrous dark crimson, ripening 
and falling at the end of September. Habitat: on dry lme- 
stone hills near Pacific, Missouri. 
Crataegus strongylophylla.—A tree 6-12 feet high. On dry 
rocky hills, Jasper County, Missouri. 
Crataegus discolor —A tree 15-20 feet high. On dry hills, 
Carter County, Missouri. 
Crataegus infesta——A tree 10-15 feet high. Along road- 
sides, Christian County, Missouri. 
Crataegus hamata.—A tree 10-12 feet high. On dry hills, 
Franklin County, Missouri. 
Crataegus tardiflora—aA tree 12-15 feet high. Along road- 
sides, Christian County, Missourt. 
Crataegus tenuis.—A tree 10-15 feet high. On dry hills, 
Franklin County, Missouri. 
Crataegus tantula.—A tree 15-25 feet high. In moist soil 
in thickets and borders of woods, Jasper County, Missouri. 
Crataegus barrettiana.—A tree 15-20 feet high. In rich 
bottom lands, St. Louis County, Missouri. 
Crataegus ferox—A shrub 10-15 feet high. On hillsides, 
Jasper County, Missouri. 
Crataegus pachyphylla.—A tree 15-20 feet high. In low 
moist soil, Cole County, Missouri. 
Crataegus albanthera—A tree 15-20 feet high. On rocky 
hills and glades, Taney County, Missouri. 
Crataegus candens.—A tree 10-15 feet high. On gravelly 
banks of streams, Shannon County, Missouri. 
