36 UNDERSHRUBS. 



32. Leaves rather broad. Kalmia. 

 Leaves narrow and small. 33. 



33. Leaf-whorls densely crowded. Erica. 

 Leaf-whorls separated, some leaves alternate. Corema. 



Deciduous Undershrubs. 



34. Leaves opposite, with pellucid dots. Ascyrum. 

 Leaves alternate. 35. 



35. Leaves conspicuously resinous-glandular. Gaylussacia. 

 Leaves scurfy. Chamaedaphne. 

 Leaves neither resin-dotted nor scurfy. 36. 



36. Leaves very sparingly scurfy beneath. Menziesia. 

 Leaves not at all scurfy. 37. 



37. Leaves curly-hairy and resinous. Rhododendron (Rhodora). 

 Not resinous or woolly, when mature. Vaccinium. 



38. With trailing leafy stems. 39. 



Forming single few-leaved stems or tufts. 57. 

 Trailing Plants. 



39. Evergreen. 40. 

 Deciduous. 54. 



40. Prickly: leaves compound. 41. 

 Unarmed : leaves simple. 42. 



Evergreen Trailers Armed. 



41. Leaves digitate: petiole breaking above base. Rubus. 

 Leaves pinnate : leaf-scar on the stem. Rosa. 



Evergreen Trailers Unarmed. 



42. Leaves alternate. 43. 



Leaves opposite or whorled, not minute. 49. 

 Leaves 4- or 6-ranked, minute. 53. 



43. Aromatic, wintergreen-flavored. Gaultheria. 

 Acrid : leaves fleshy, scale-like. Sedum. 

 Not aromatic or very acrid. 44. 



44. Leaves characteristically lobed. Hedera. 

 Leaves not lobed. 45. 



45. Leaves revolute. 46. 

 Leaves not revolute. 47. 



46. Leaves short-elliptical, rough. Chiogenes. 

 Leaves elongated and narrow. Daphne. 



