ROSACE^E 



413 



reflexed closely appressed persistent lobes; flesh thin, dry and hard; nutlets 2 or 3, broad 

 and rounded at base, narrowed at apex, about j' long. 



A tree, 18-20 high, with a slender stem covered with close dark slightly ridged bark, 

 small wide-spreading branches forming a flat-topped head, and slender slightly zigzag 



Fig. 366 



orange or red-brown branchlets unarmed, or armed with few or many straight or slightly 

 curved dark chestnut-brown shining spines f'-l' in length. 



Distribution. Woods in low sandy soil; eastern Texas (near Marshall, Harrison County, 

 and Livingston, Polk County). 



15. Crataegus Engelmannii Sarg. 



Leaves oblong-obovate or rarely elliptic, rounded or often short-pointed and acute at apex r 

 gradually narrowed or entire below, finely crenulate-serrate usually only above the middle 



Fig. 367 



and generally only at the apex, nearly fully grown and roughened on the upper surface by 

 short rigid pale hairs when the flowers open about the middle of May, and at maturity 



