54 NEW YORK STATE MUSEUM 



Stamens 9-10 C. geneseensis 



Stamens 10-20 



Flowers at least 1.8 cm in diameter, in broad many- 

 flowered corymbs ; leaves broadly ovate ; fruit 



crimson, spines stout C. robusta 



Flowers not more than 1.2 cm in diameter, in few- 

 •flowered corymbs ; leaves narrowly obovate ; fruit 

 bright cherry red; spines slender.. C. cerasina 

 ft Corymbs more or less villose 



Mature leaves glabrate ; corymbs slightly villose ; stamens 

 10-20, anthers dark rose color; fruit short-oblong to 



subglobose C. persimilis 



Mature leaves pubescent below : corymbs densely villose ; 

 stamens 10-14, anthers white sometimes faintly tinged 



with pink; fruit short-oblong to obovoid 



C . helderbergensis 



Punctatae 



Leaves thin, mostly acute or acuminate, usually more or less 

 lobed above the middle, their veins prominent, petioles short; 

 flowers in many-flowered corymbs; anthers rose color or pink 

 (pale yellow in one variety of no. 1) ; fruit subglobose to 

 ellipsoidal or obovoid, usually more or less flattened at the 

 ends, punctate, flesh dry and mealy, nutlets 2-5, prominently 

 ridged on the back. 

 * Stamens 20 



Leaves more or less villose at maturity; anthers rose 

 color, or yellow (in var. aurea ) ; leaves obovate, often 

 acutely lobed above the middle on vigorous shoots; fruit 

 flattened at the ends, marked by large dots, dull red, or 



yellow (in var. aurea) C. punctata 



Leaves glabrous at maturity 

 f Anthers dark rose color 



Pedicels stout, villose ; calyx thickly coated with 

 white hairs ; fruit subglobose, crimson, lustrous 



C . c e 1 s a 

 Pedicels slender, glabrous ; calyx glabrous ; fruit 

 short-oblong to slightly obovoid 



Flowers not more than 1.2 cm in diameter; fruit 

 orange-red, lustrous ; leaves cuneate at the base 



C . n o t a b i 1 i s 



