ERICACEAE. 147 



3. Flowers rosy-white, spotted. R. maximum. 

 Flowers white. R. maximum album. 

 Flowers purplish. R. maximum purpureum. 



4. Bud-scales two to four. 5. 

 Bud-scales many. 6. 



5. Leaves deciduous. R. indicum. 

 Leaves evergreen. B. imlicum Simsii. 



6. Corolla glabrous, with very short tube. 7. 

 Corolla pubescent, funnel-shaped. (Azalea). 8. 



/. Corolla evidently 2-lipped. (Rhodora). R. canadense. 



Corolla scarcely 2-lipped, upper lobes spotted. R. Vaseyi. 



8. Corolla not glandular, yellow to flame-color. R. sinense. 

 Corolla glandular-pubescent. 9. 



9. Flowers white or rosy. 10. 

 Flowers yellow or flame-colored. 12. 



10. Twigs glabrate. R. arborescens. 

 Twigs pubescent or rough-hairy, n. 



11. Buds glabrous. R. viscosum. 

 Buds pubescent. R. nudiflorum. 



12. Twigs glabrous or with stiff hairs. Hardy. 13. 



Twigs pubescent. Tender. R. gandavense. 



13. Yellow predominating in flowers. R. calendulaceum. 

 Orange predominating. R. calendulaceum croceum. 



MENZIESIA. 



Deciduous shrubs with shredding bark ; rather soft wood 

 with minute diffused ducts and fine medullary rays ; slender 

 subterete twigs ; 3-sided brownish continuous pith ; alternate 

 somewhat raised triangular or shield-shaped leaf-scars with a 

 single bundle-trace ; no stipule-scars ; small round buds with 

 several exposed scales, or the upper ovoid and larger ; lance- 

 elliptical moderately small entire short-petioled leaves clustered 

 at end ; relatively large urn-shaped gamopetalous perfect flowers 

 loosely clustered above ; and small ovoid capsules. 

 Leaves rough-hairy above : capsules glandular. M. pilosa. 



Leaves' smooth : capsules glabrate. M. glabella. 



