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are oval and roundish in outline and lobed or coarsely double- 

 toothed on the margins. In late spring the beautiful clusters 

 of white flowers make the tree very attractive. About Oc- 

 tober the dark red fruits ripen, and they are usually about 

 y 2 inch in diameter and almost round. Imbedded in the 

 dry yellow flesh are usually 2 to 4 stones. 



Thin-leaved Thorn Crataegus tenuifolia 



In early spring this thorn is a conspicuous feature in the 

 landscape as its young leaves are bronze-red. The tree is 

 often 25 feet high or more, and usually has a large round 

 crown. On the trunk the bark is scaly and gray-brown but 

 the twigs are smooth and reddish-brown. The ellipsoid or 

 oval leaf-blades are coarsely double-toothed on the margin, 

 green on the upper surface and somewhat paler on the lower. 

 The leaves have a tendency to be broadest towards their 

 bases. The many-blossomed clusters of flowers are at- 

 tractive in the early summer, followed in August or Sep- 

 tember by the small apple-like fruits. These are crimson, 

 pear-shaped or oblong and not more than Y$ of an inch in 

 diameter. In the acid yellow flesh there are usually 4, some- 

 times 3 or 5, stones imbedded. 



The thin-leaved thorn grows wild from western New 

 England to Virginia and westward. It is fairly common 

 in the upper and central part of the Hudson Valley. 



The twin-mountain thorn (Crataegus pentandra) differs 

 from the thin-leaved thorn in having mostly 3 stones im- 

 bedded in the flesh of the fruit. It rarely exceeds 15 feet in 

 height. It is known to grow in the central part of the 

 Hudson Valley. 



Pringle's Thorn Crataegus Pringlei 



This is one of the most variable thorns of the region. 

 The lobing of the leaves is often very different on separate 

 plants but usually the leaf-blades are coarsely double-toothed 

 or lobed. The many-flowered clusters of blossoms are very 

 beautiful in the early summer and the fruit matures later 



