Crataegus 



Rosaceae 



537 







Map 1102 

 Crataegus pyracanthoides 

 var. arborea (Beadle) Palmer 



1. Crataegus crus-galli L. {Crataegus arduennae Sarg., Crataegus at- 

 tenuata Ashe, and Crataegus trahax Ashe.) Cockspur Thorn. Map 1101. 

 Leaves mostly spatulate or obovate, 2-6 cm long, 1-3.5 cm wide, rounded 

 or acute at the apex, attenuate at the base into short, slender petioles, 

 sharply serrate to below the middle, glabrous, firm in texture, usually glossy 

 on the upper surface; flowers 12-15 mm wide, in compound, glabrous 

 corymbs ; stamens about 10 ; anthers pink or creamy white ; styles 1-3 ; 

 fruit obovoid to subglobose, 9-12 mm in diameter, flesh thin, hard and 

 dry, dull crimson, with dark blotches or dots; calyx sessile or nearly so; 

 calyx lobes entire or slightly serrate near the base ; nutlets 1-3, usually 2. 



A small tree or rarely a stout shrub up to 6-7 m high, with slightly 

 scaly, pale gray bark and spreading branches, forming a low, flat crown 

 in old specimens: branchlets often flexuous and armed with numerous, 

 long, slender thorns. 



General throughout Indiana, but most common in limestone regions, 

 growing in fertile or rocky ground in thickets and pastures, and in open 

 woodland along small streams. 



Southeastern Canada to Minn., southw. to S. C. and Ark. 



la. Crataegus crus-galli var. pyracanthifolia Ait. Differs from the 

 typical form only in the narrower leaves and the usually smaller fruit. 

 This variety is known in Indiana only from Posey County, but it is likely 

 to be found in other sections. 



2. Crataegus pyracanthoides Beadle var. arborea (Beadle) Palmer. 

 (Crataegus arborea Beadle and Crataegus tenuispina Sarg.) Map 1102. 

 Leaves narrowly obovate or lance-obovate, 3-6 cm long, 1.5-3 cm wide, 

 acute or short-acuminate at the apex, narrowed at the base into slender, 

 winged petioles, serrate to below the middle with broad, shallow teeth, 

 rather thin but firm, glabrous, glossy above; flowers 12-14 mm in diame- 

 ter, in lax, mostly 6-10-flowered, glabrous corymbs ; stamens 10-20 ; anthers 

 usually white or cream color; styles 3-4; fruit subglobose, 7-10 mm in 

 diameter, orange red, flesh thin; nutlets 2-4, usually 3. 



