144 



Leguminosae. 



Cladrastis. Yellow-wood. 

 (Family Leguminosae). 



Rather small trees: deciduous. 

 Twigs moderate, terete, some- 

 times zig-zag: pith moderate, 

 round, continuous, usually pale. 

 Buds sessile, either solitary and 

 evidently scaly (1) or not dis- 

 tinctly scaly and in superposed 

 aggregates resembling single buds 

 (2, 3), the end-bud lacking. Leaf- 

 scars alternate, 2-ranked, half- 

 round (1) or narrowly C-shaped 

 and encircling the bud (2, 3), 

 slightly raised: bundle-traces 3 or 

 5: stipule-scars lacking. (Includes 

 Maackia). 



Winter-character references: 

 C. amurensis. Schneider, f. 70. 

 C. amurensis floribunda. Shira- 

 sawa, 245, pi. 4. C. lutea. Blakes- 

 lee & Jarvis, 331, 334, 520, pi.; 

 Schneider, f. 4, 63, 70. 

 The two groups represented respectively by Cladrastis 

 (or Maackia) amurensis and by C. lutea and C. sinensis, show 

 a very marked difference in winter-characters, though on 

 technical taxonomic grounds they are now united under a 

 single generic name. 



1. Buds with 2 exposed pale-margined scales. 



(1). C. (Maackia) amurensis. 

 Buds not evidently scaly: leaf-scars narrow. 2. 



2. Twigs red-brown: buds short (scarcely 5 mm.). 



(2). C. lutea. 

 Twigs buff: buds conical, 7-10 mm. long. (3). C. sinensis. 



