IO4 LEGUMINOSAE. 



wood with moderately large ducts crowded in the vernal wood 

 and passing into smaller ones in more or less evident wavy trans- 

 verse parenchyma-patterns later in the season, and moderate 

 medullary rays replaced at intervals by heavier ones ; moderately 

 stout rounded rather zig-zag twigs somewhat swollen at the 

 nodes ; angular brown homogeneous pith ; alternate low more or 

 less heart-shaped or finally U-shaped leaf-scars with 3 bundle- 

 traces ; small rounded sessile superposed more or less concealed 

 buds with several scales, the end-bud lacking ; large pinnate or 

 bipinnate leaves with rather crenulate smallish leaflets ; incon- 

 spicuous polygamous flowers in lateral clusters ; and often very 

 large sometimes twisted thin legumes. 



1. Spines rounded : leaves mostly once-pinnate. 2. 



Spines flattened or absent : leaves mostly twice-pinnate. 3. 



2. Tree. G. sinensis. 

 Shrub. G. sinensis nana. 



3. Leaves glabrate : pod I- to 3-seeded. G. aquatica. 

 Leaves with pubescent vein-axils : pods many-seeded. 4. 



4. Leaflets obtuse or notched, scarcely 20. G. japonica. 

 Leaflets rather acute, over twenty. 5. 



5. Trees. 6. 



Shrub : unarmed. G. triacanthos elegantissima. 



6. Unarmed. G. triacanthos inermis. 

 Armed. 7. 



/. Scarcely weeping. G. triacanthos. 



Weeping. G. triacanthos Bujotii. 



CERCIS. Redbud. 



Deciduous shrubs or small trees with smoky or brownish 

 wood with small ducts in wavy patterns or those of the spring 

 somewhat larger and more crowded, and fine but distinct medul- 

 lary rays ; moderately slender zig-zag roundish twigs ; roundish 

 or angled homogeneous pale or pinkish pith ; alternate 2-ranked 

 raised half-round or 3-angled small leaf-scars with 3 bundle- 

 traces or a single crescent-shaped aggregate; stipule vestiges 

 above the leaf -scar ; ovoid superposed lateral buds, the upper- 

 most often somewhat stalked with several exposed scales and 



