Handbook of TsErES of the Noeti-iern States and Canada. 259 



The Long-spine Haw or Thorn is a tree of 

 medium size for its genus, being seldom more 

 than IS or 20 ft. in height, with rigid and 

 often croolced branches forming a rather open 

 and irregular top, and trunk (i-8 in. in dianie 

 tcr. This is vested in a pale brown or gray 

 bark which exfoliates in small elongated scales. 



It inhabits the banks of streams and ricb 

 slopes, more commonly of limestone forma- 

 tion, and attracts the attention of even the 

 casual observer on account of its numerous 

 very long chestnut brown thorns, which are 

 rather slender, somewhat curved and often .3 

 or 4 inches or more in length. We cannot but 

 wonder what may be nature's plan in equip- 

 ping this tree with so much more formidable 

 an armament than she has the other species. 

 It is a tree of handsome rich foliage and is a 

 very beautiful object when bearing its large 

 clusters of pure white flowers, as it is also in 

 autumn with its lustrous crimson fruit. 



Leaves broad-obovate to oval, 2-4 in. long, ab- 

 ruptly or gradually cuneate and entire at base, 

 mostly acute or rounded at apex, coarsely and 

 sometimes doubly serrate or with short pointed 

 lobes, coriaceous at maturity and dull dark green 

 with impressed veins above, paler and puberulons 

 on the prominent veins and midribs beneath ; 

 petioles stout, margined above. Flowers, May- 

 .Tune, % In. in diameter in many-flowered villose 

 compound corymbs ; calyx with long, narrow, 

 acuminate lobes with dark glands ; stamens 

 usually 10 (or 8-12) ; anthers pale yellow: styles 

 2-.3, tomentose at base. Fruit ripening in Sep- 

 tember in erect many-fruited clusters, subglobose, 

 Mt in. in diameter, lustrous crimson with serrated 

 oalyx-lobes retlexed and persistent : nutlets 2 or 

 ri, prominently ridged on the back and with deep 

 ventral cavites. 



