xvi 



105a. Foliage fragrant when crushed; leaves ovate 



Ib, in LAURACEAE, p. 41. 

 105b. Foliage not aromatic; leaves heart-shape 



3b, in LEGUMINOSAE, p. 58. 



106a. Lateral veins straight and parallel, running to the teeth 

 of the leaf 3a, in BETULACEAE, p. 22. 



106b. Lateral veins curved or branched, and not running straight 

 to the teeth 107. 



107a. Tall shrubs with somewhat milky juice and broadly ovate 

 leaves 2b, in UHTICACEAE, p. 23. 



107b. Low shrubs less than 1 m. high with watery juice 



Ib, in RHAMXACEAE, p. 71. 



108a. Leaves with 2 or 3 entire lobes, spicy-fragrant when 



crushed Ib, in LAURACEAE, p. 41. 



108b.- Leaves with milky juice 2b, in URTICACEAE, p. 23. 



108c. Leaves neither spicy-fragrant nor with milky juice 109. 



109a. Stem covered with brown bristles 29, in ROSACEAE, p. 54. 

 109b. Stem not bristly 110. 



llOa. Sides of the petiole strongly decurrent on the stem; 



bundle-scars crowded or nearly in contact in the leaf-scars 



28b, in ROSACEAE, p. 53. 

 llOb. Sides of petiole little decurrent or not at all; bundle-scars 



distinctly separate 2b, in SAXIFRAGACEAE, p. 49. 



Ilia. Leaves aromatically fragrant when crushed 112. 

 lllb. Leaves not aromatically fragrant when crushed 113. 



112a. Leaves broadly obovate, entire; a common woodland shrub 



la, in LAURACEAE, p. 41. 



112b. Leaves linear-lanceolate or oblanceolate, conspicuously 

 toothed or entire . MYRICACEAE, p. 20. 



113a. Leaves entire 114. 



113b. Leaves toothed cr lobed 121. 



114a. Base of the petiole covering the axillary buds;, twigs 

 marked with rings THYMELAEACEAE, p. 77. 



114b. Base of petiole not covering the bud, and twigs not marked 

 with rings 115. 



115a. Pith with prominent partitions; tall shrubs with fetid bark; 

 leaves obovate, 10 cm. long or larger ANONACEAE, p. 40. 

 115b. Pith not partitioned; leaves smaller 116. 



116a. Leaves waxy or resinous underneath 



24b, in ERICACEAE, p. 86. 

 116b. Leaves not waxy or resinous 117. 



