Composite? Cosmos. 



247 



2. C. diver sifolius^ syn. Dahlia Zimapani. A tuberous- 

 rooted dwarf perennial with Dahlia-like foliage and uniform 

 dark purple flowers. 



22. SANVITALIA. 



There is one annual species of this genus in cultivation, 

 which is pretty well known. The characters are : involucral 

 bracts numerous, in two or three series ; receptacle bracteolate ; 

 achenes of the disk crowned with a pappus of three bristles, 

 and those of the ray muricate or winged. A commemorative 

 name. 



1. S. procumbens. A trailing glabrous much-branched 

 plant, having ovate entire leaves and bright yellow flower- 

 heads with a black centre. There is a double variety of recent 

 acquisition. Native of Mexico. 



23. TAGETES. 



Handsome annual or perennial plants, emitting a powerful 

 and somewhat disagreeable odour when bruised or touched. 

 Leaves pinnate or simple. Involucre composed of about five 

 bracts, cohering in a tube. 

 Florets normally 5, or rarely 

 fewer, persistent. Achenes 

 linear, elongated, sur- 

 mounted by a pappus of 

 five bristles. About fifteen 

 species are known, all Ame- 

 rican. The name is of 

 classical origin. 



1. T. pdtula (fig. 135). 

 French Marigold. This 

 and the next species are 

 ranked amongst the earliest 

 of cultivated ornamental 

 plants, having been grown 

 in our gardens for nearly 

 three centuries. There are 

 many handsome varieties in 

 which the florets are en- 

 larged and more numerous 



Fig. 13o. Tagcces patula. (J nat. size.) 



than in the wild form, 



ranging from 9 inches to 2 feet in height, and varying in 



