﻿THE GENUS CRATAEGUS IN NEWCASTLE COUNTY, 



DELAWARE. 



Charles S. Sargent. 



These notes are based on collections and observations of the 

 genus Crataegus made during the last three years in Newcastle 

 county, Delaware, by Mr. W. M. Canby. 



CRUS-GALLI. 



Stamens lo, 



Crataegus Crus-galli Linnaeus, — Near Wilmington the typ- 

 ical form of this species is common. It is a glabrous tree with 

 wide-spreading branches, obovate coriaceous leaves with the pri- 

 mary veins mostly within the parenchyma, lO stamens, bright 

 rose-colored anthers, and sub-globose or short-oblong dull crim- 

 son fruit which often remains on the branches late into the winter 

 or until spring. The leaves on short lateral branches are clustered 

 and erect, while the long and numerous spines mostly point 

 downward. In the middle states, however, there are many per- 

 plexing forms of this species; some have more or less hairy 

 corymbs ; of others the fruit varies in size, shape, and brightness 

 of color ; of others the leaves are thinner, nearly always acute 

 and sharply serrate, with more prominent veins, and occasionally 

 individuals are found nearly destitute of thorns. Some of the 

 most distinct of these varieties may be characterized as follows: 



Crataegus Ckus-galli oblongata, n. var.— Fruit oblong, often 



2.5^"^ in length, rather brighter colored than the fruit of the 

 type ; nutlets i or 2, acute at the ends, prominently or often 

 only slightly ridged on the dorsal side, lO to li^"" long. 



Meadow near Ed^emoor, W. M. Ca?tby, September 30, 1899, June 3, 

 I90J ; Pennsylvania, Dunham, Bucks county, C D. Fretz, October 1901, 

 September 1902. 



1903] 99 



