a bed 5 el 19 



i Subglobose, %-l in., in small drooping villous clusters; calyx-lobes 

 large and deciduous; nutlets 4 or 5; Ivs. truncate or subcordate 

 b., with appressed pubescence ab., pubescent bn. 



RED-FRUITED THOBN ((7. mollis). 



I 2 Obovoid-oblong, in erect compact clusters with prominent and per- 

 sistent calyx-lobes and tube; Ivs. rounded b., acute or obtuse a. 



CHAMPLAIN THOBN (C. Champlainensis) . 

 hs Smooth and lustrous, about % in.; Ivs. scabrous ab.; fr. 



i Orange red with pale dots, obovoid, calyx-lobes enlarged and per- 

 sistent; Ivs. thickish RED-FRUITED THORN (C. submolis). 



i 2 Bright scarlet with dark dots; Ivs. membranaceous. 



SCARLET THORN ( C. pedicellata ) . 



gs Triangular-ovate, 1^-3 in., truncate b., acute or acuminate a., lustrous 

 dark green ab., coarsely serrate-dentate and incisely 3-5-lobed. 



WASHINGTON THORN (C. cordata). 

 g6 Oval to orbicular. 



h Membranaceous, hairy on veins bn., 



i Rounded or obtuse a. and b., sharply serrate with 2-3 short lobes, 

 glabrous yellow-green ab., paler and concave bn. 



PRINGLE'S THORN (C. Pringlei). 



12 Acute or acuminate a., rounded b., sharply serrate-dentate, and with 

 3 or 4 pairs short lobes, scabrous ab., pubescent on veins bn. 



HOLME'S THORN (C, Holmesiana). 



