116 ERICACEAE 



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

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



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

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



8. Corolla not glandular. 9. 

 Corolla glandular-pubescent. 10. 



9. Flowers yellow or flame color. R. sinense. 

 Flowers white or pink. R. nudiflorum. 



10. Flowers white or rosy. 11. 

 Flowers yellow or flame-colored. 13. 



11. Twigs glabrate: flowers after the leaves. R. arborescens. 

 Twigs pubescent or rough-hairy. 12. 



12. Buds glabrous: flowers after the leaves. R. viscosum 

 Buds and leaves pubescent. R. canescens. 



13. Twigs glabrous or with stiff hairs. Hardy. 14. 



Twigs pubescent. Tender. R. gandavense. 



14. 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 cluster- 

 ed 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. 



LEIOPHYLLUM. Sand Myrtle. 



Small evergreen shrubs with shredding bark; slender sub- 

 terete twigs; minute continuous 3-sided pith; sub-opposite 

 minute crescent-shaped raised leaf-scars with a single bundle- 

 trace; no stipule-scars; minute appressed pointed buds with 

 indistinct scales; small elliptical glabrous entire leaves; small 



