104 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. 
I. 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. 
7. Scarcely weeping. e 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 
