132 ROCHESTER ACADEMY OF SCIENCE. 



§ TOMENTOSAE. 



Fruit small or viedhwi size, pyriform, szibglobose or short-oblongs 

 orange-red or scarlet ; Jiutlcts 2-§, peJietrated on each of the inner 

 faces by a longitudinal cavity ; corymbs many-flowered, villose or 

 glabrous ; calyx-lobes glandular-serrate ; stamens 10-20 ; anthers 

 rose color or yellozv ; leaves thin or coriaceous, more or less pubes- 

 cent or rarely glabrous on the loivcr surface, 



ANTHERS ROSE COLOR. 



Stamens 20. 



Leaves ovate to ovate-oblong, thin, densely pubescent below; 

 fruit pyriform, small, orange-red ; nutlets 2-5. 



j5 C. tomeyitosa. 

 Leaves elliptical, acute at the ends, puberulous along the 

 under side of the midribs and veins ; fruit globose, 

 becoming soft and succulent at maturity ; nutlets 2-3. 



j6. C. succulenta. 

 Leaves broadly oval to obovate, coriaceous, pubescent below ; 

 fruit subglobose to short-oblong, becoming soft and 

 succulent at maturity ; nutlets 2-3, usually 3. 



SJ. C. ge?nmosa 

 Stamens 10. 

 Leaves ovate, thin, glabrous ; fruit subglobose to short- 

 oblong ; nutlets 2-3, usually 3. j8. C. Deweyana. 



ANTHERS YELLOW. 



Leaves broadly obovate to elliptical or oval, coriaceous, 

 pubescent below along the midribs and veins ; fruit small 

 scarlet, erect ; nutlets 2-3 ; spines long and slender. 



jQ C. macracantha. 



Leaves rhombic to oval or obovate, coriaceous, puberulous 

 below along the midribs and veins ; fruit subglobose to 

 short-oblong ; nutlets 2 ; spines stout. 



^o C. ferentaria. 



Leaves oval to oblong-obovate, thin, puberulous along the 

 midribs and veins below ; fruit subglobose, dark orange- 

 red ; nutlets 2-4. 41. C. Laneyi 



Crataegus tomentosa, Linnaeus. Sargent, Silva, N. Am. iv. 

 loi, t. 183. 



Rochester ; Common. 



