174 CAPRIFOLIACEAE. 



13. Buds, petioles etc. very red-scurfy. V. rufidulum. 

 Buds etc. rather gray-brown, glabrescent. 14. 



14. Leaves small (about 4X6 cm.), scarcely taper-pointed: 



twigs often stiff and spreading. V. prunifolium. 



Leaves larger (about 5X8 cm.), acuminate. V. Lentago. 



15. Petiole without nectar-glands. 16. 

 Several nectar-glands on petiole. 17. 



16. Pubescent : glandless : with stipules. V. acerif olium. 

 Glabrate : lower teeth glandular : no stipules. V. pauciflorum. 



17. Glands large (about I mm. in diameter).. 18. 



Glands small (about .5 mm.). V. americanum. 



18. Some flowers fertile. 19. 



Flowers all showy and sterile. (Snowball). V. Opulus. 



19. Dwarf. V. Opulus nanum. 

 Tall shrubs. 20. 



20. Sterile flowers large (25 mm.). V. Sargentii. 

 Sterile flowers rather small (15-20 mm.). 21. 



21. Fruit red. V. Opulus. 

 Fruit yellow. V. Opulus xanthocarpum. 



SYMPHORICARPOS. 



Deciduous small shrubs with slendeV terete twigs ; small rounded 

 continuous or evanescent pith ; opposite somewhat raised crescent- 

 shaped leaf-scars with a single bundle-trace ; no stipule-scars ; 

 ovoid buds with about 2 pairs of exposed scales ; simple entire 

 or exceptionally lobed ovate petioled leaves ; small white or nosy 

 bell-shaped perfect gamopetalous flowers, hairy within ; and white 

 or red inferior berries, 

 i Pith continuous: leaves small (scarcely 40 mm.), white 



beneath : fruit red. 2. 

 Pith excavated: leaves larger: fruit white. (Snowberry). 3. 



2. Leaves unvariegated. (Coral berry). S. orbiculatus. 

 Leaves variegated. S. orbiculatus variegatus. 



3. Leaves often deeply lobed, glabrate : fruit late. X S. Heyeri. 

 Leaves very rarely a little lobed. 4. 



