144 REPRODUCTIVE ORGANS. CHAP. III. 



secondary umbels, as in the genus Heracleum and 

 most umbellate plants, the umbel is then said to be 

 compound. It is terminal, as in the Carrot ; or 

 lateral, as in Caucalis nodiflora. It is also sessile, 

 that is without any foot-stalk, as in Slum nodiflo- 

 rum ; or pedunculate, that is furnished with a pro- 

 per foot-stalk, as in Tordylium officinale. The rays 

 are said to be crowded if placed close together, as 

 in Sanicula europea ; or distant if placed wide apart, 

 as in Slum repens. The flowers are either equal, as 

 in Bunium ; or unequal, as in Heracleum. The 

 surface of the umbel is flat, as in Imperatoria ; or 

 concave, as in the Carrot ; or convex and approach- 

 ing to globular, as in Angelica sylvestris. 



SUBSECTION X. 



Descrip- The Cyme. The cyme or tuft (PI. V. Fig. 1O.) 

 modffica- cons ^ s ts of an assemblage of flowers supported upon 

 peduncles issuing from a common centre, as in the 

 umbel, and rising to the same height ; but irregu- 

 larly divided at the top. The inflorescence of the 

 Elder is a very familiar example. In Sedum Aizoon 

 the cyme is sessile ; in Viburnum it is supported 01 

 a foot-stalk. In the Elder it is terminal ; in Laurus- 

 tinus it is, often lateral ; in Sedum sexangulare it is 

 leafy ; in Sedum angticum it is naked. 



tions. 



