UtfDEBSHBUBS XXXiX 



Deciduous Undershrubs. 



33. Leaves opposite, with pellucid dots. p. 105. Ascyrum. 

 Leaves alternate. 34. 



34. Leaves conspicuously resinous. p. 122. Gaylussacia. 

 Leaves scurfy. p. 119. Chamaedaphne. 

 Leaves neither resin-dotted nor scurfy. 35. 



35. Leaves very sparingly scurfy beneath, p. 116. Menziesia. 

 Leaves not at all scurfy. 36. 



36. Leaves hairy and resinous. p. 115. Rhododendron. 

 Not resinous or woolly, when mature. p. 123. Vaccinium 



37. With trailing leafy stems. 38. 



Forming single few-leaved stems or tufts. 56. 

 Trailing Plants. 



38. Evergreen. 39. 

 Deciduous. 53. 



39. Prickly: leaves compound. 40. 

 Unarmed: leaves simple. 41. 



Evergreen Trailers Armed. 



40. Leaves digitate: petiole breaking above base. p. 64. Rubus. 

 Leaves pinnate: leaf-scar on the stem. p. 66. Rosa. 



Evergreen Trailers Unarmed. 



41. Leaves alternate. 42. 



Leaves opposite or whorled, not minute. 48. 

 Leaves 4- or 6-ranked, minute. 52. 



42. Aromatic, wintergreen-flavored. p. 121. Gaultheria. 

 Acrid: leaves fleshy, scale-like. p. 45. Sedum. 

 Neither aromatic nor succulent. 43. 



43. Leaves characteristically lobed. p. 112. Hedera. 

 Leaves not lobed. 44. 



44. Leaves revolute. 45. 

 Leaves not revolute. 46. 



45. Leaves short-elliptical, rough. p. 122. Chiogenes. 

 Leaves elongated and narrow. p. 106. Daphne. 



46. Leaves white beneath. p. 123. Vaccinium. 

 Leaves green beneath. 47. 



47. Leaves numerous, small. p. 59. Cotoneaster. 

 Leaves larger, cordate. p. 120. Epigaea. 



