152 



Leguminosae. 



Colutea. Bladder Senna. 

 (Family Leguminosae). 



Shrubs: deciduous. Twigs mod- 

 erate, terete except for shortly 

 decurrent; lines from the nodes: 

 pith moderate, rounded, continu- 

 ous. Buds small, usually super- 

 posed and the upper promptly 

 developing into slender branches, 

 with 2 or 4 visible scales or 

 leaves. Leaf-scars alternate, 

 broadly crescent-shaped, much ele- 

 vated: bundle-trace 1 or 3, or the 

 middle one divided: stipules per- 

 sistent on the sides of the leaf- 

 cushion. 



Winter-character references: 

 C. arborescens. Bosemann, 54; 

 Schneider, f. 81, 139; Willkomm, 

 3, 7, 42, f. 69. C. orientalis. 

 Schneider, f. 81. 



In a paper published in the 

 journal Linnaea in 1837, Ohlert 

 shows that Colutea produces some thirty internodes in a year's 

 twig-growth. Half-a-dozen of these are preformed in the bud: 

 the remainder develop during the growing season. He notes 

 the striking contrast between this and the behaviour of, for 

 instance, Tilia, in which more preformed leaves are found in 

 the bud than are to be counted on the developed branch be- 

 cause of the abscission of its terminal parts. 

 Appressed-pubescent. (1). C. arborescens. 



Glabrescent. (2). C. cilicica. 



