bcd 5 ef 18 



h2 Leaves dull gray-green ab., more membranaceous ; fr. subglobose, y?-l 

 in., dull red or yellow with white dots. 



DOTTED THORN (G. punctata) . 



g2 Obovate-oblong, wider and short cuneate b., petioles longer and winged ab. 



h Irregularly serrate-dentate, acute or blunt-pointed and slightly, if at all, 



lobed, dark green and smooth ab. ; fr. scarlet or orange, 14 in. or 



less ; nutlets usually 5 SOUTHERN THORN ( C. viridis ) . 



h2 Crenate-serrate or with short crenate toothed lobes, rounded or obtuse 

 a.; fr. oblong-globose, y 2 in., dark red or orange, black dotted, with 



2-3 nutlets MARGARETTA THORN (C. Margaretta) . 



h3 With short acute-toothed lobes or doubly serrate-dentate, obtuse to 

 acute a., pubescent bn. 2-5 in. ; petioles glandular ; fr. oblong- 

 globose, y 2 in.; nutlets 2-3 with ventral cavities. 



PEAR THORN (C. tomentosa) . 



gs Obovate-orbicular, rounded or obtuse a., coriaceous, coarsely and irregu- 

 larly serrate-dentate, or very slightly lobed; thorns 2^-4 in.; fr. 

 lustrous crimson, %-% in., subglobose, on erect stems; nutlets with 

 deep ventral cavities. . . .LONG-SPINE THORN (Crataegus macracantha) . 

 g* Leaves broad-ovate; 



h Waxy-coated, slightly 5-angled and flattened subglobose, apple-green 

 becoming purplish red; Ivs. subcordate b., acute, with 3 or 4 pairs 



short pointed lobes, thickish WAXY THORN (C. pruinosa) . 



hz Fruit pubescent at least at the ends, 



