\ 



CRATAEGUS IN MISSOURI. 



37 



this group have only ten stamens ; west of the Mississippi 

 River only species with tw^er 

 Of the Missouri species of tt 

 Schccle extends beyond the 



found 



sissippi bottoms i: 

 the neighborhood 

 Counties. One s: 



the limits of tt 

 described is found 



Crataegus 1 

 ) state, and 



one 



L Illinois. Species in this group abound in 



of St. Louis and in Jackson and Jasper 



lecies still undescribed occurs in Taney 



d although one species is known in Shannon 



County and another in St. Francois County, the Molles 



Group 



eastern part of the state. 



considered very abundant in the south- 



one another two species of the small _ 



which is otherwise distinctly northeastern, with species ex- 



state remote from 

 group of Dilatatae 



from Quebec and eastern Massachusetts 



York and southern Ontario. 



New 



most abundant 



on the New England seacoast and the valley of the St. Law- 

 rence River and to which belong the most northern species 

 of the genus in America, is represented in Missouri by a sin- 



gle rather abnormal 

 first discovered in the 



known to 

 Ontario. 



Crataegus Margaretta Ashe, 



St. Louis but now 



middle Tennessee, Iowa 



The Uniflorae, a group of a few small shrubs otherwise 

 found in the Atlantic-coast region from New Jersey south- 

 ward and on the foothills of the southern Appalachian 



southern Missouri with a single dis- 



represent the In- 



Mountains 

 tinct 



Missouri 



tricatae, a large eastern and southern Appalachian group 

 most abundant in species in eastern Pennsvlvania and ex- 



of 



; to southern Michigan 

 Mississippi River found 



Mississippi, but west 



Counties, Missouri. Of the three species of the Microcarpac 



Group only one, Crataegus cordata Alton, reaches southern 



Missouri from the Atlantic states, although in Jasper County 



there are indications that an undescribed species of this 

 group occurs. 



