UNWCBSHBUBS xxxvii 



C. UNDERSHRUBS OR BOG OR ROCKERY PLANTS. 



1. Forming cushions or mats: essentially evergreen. 2. 

 Not growing in dense mats. 15. 



Matted Plants. 



2. Leaves simple. 3. 



Leaves digitately compound, of 3 leaflets. 14. 



3. Leaves brown-scurfy, elliptical, p. 115. Rhododendron. 

 Leaves not scurfy. 4. 



4. Leaves white-hairy beneath, crenate. p. 64. Dryas. 

 Leaves not woolly, entire. 5. 



5. Leaves crowded close to the ground. 6. 

 Leaves on more or less elongated stems. 7. 



6. Leaves fleshy. p. 45. Sedum. 

 Leaves not fleshy. p. 35. Silene. 



7. Leaves widened upwards. p. 124. Diapensia. 

 Leaves not widened upwards. 8. 



8. Leaves revolute. p. 83. Empetrum. 

 Leaves not revolute. 9. 



9. Leaves veinless, crowded. 10. 

 Leaves veined. 12. 



10. Leaves needle-shaped: plants moss-like, p. 117. Cassiope. 

 Leaves short and fleshy. p. 45. Sedum. 

 Leaves lanceolate or oblong, not succulent. 11. 



11. Leaves oblong. p. 117. Phyllodoce. 

 Leaves lanceolate. p. 134. Phlox. 



12. Leaves elliptical or obovate. p. 123. Vaccinium. 

 Leaves rather lanceolate , not dotted. 13. 



13. Stems nearly herbaceous. p. 134. Phlox. 

 Stems woody. p. 124 Pyxidanthera. 



14. Stipules small. p. 64. Potentilla. 

 Stipules elongated along the leaf-stalk, p. 63. Sibbaldia. 



15. Loosely low-bushy: leaves simple. 16. 

 Neither matted nor bushy. 37. 



16. Evergreen. 17. 

 Deciduous. 33. 



