7S NEOBOT. 



and Georgia, nearer to M. cyananthera thtn 

 M. angustifolia, but leaves quite slender uni- 

 nerve smooth, anthers also bluish thus we have 

 6 sp. of this pretty G. a 7th might be my M. 

 pumila now my G. Tnerolepta Neog. 1825. 

 EUPATORIUM and akin 



This extensive G. is now divided into many 

 Celf-stina, Jtrickellia, Mikania, Kalinia c, 

 besides my Eutrochium with scanose terete 

 perianthe, leaves verticillate &c,rny Caradesva 

 with perianthe hemispherical multiflore: thus 

 reduced to the sp. with a definite number of 

 florets and segments of perianthe, it is still pro- 

 lific. The American Cacalias are very near, 

 but form 3 peculiar Genera, my Epatitis 205, 

 Jliesadenia and Hasteola. 



035. MESADENIA Raf. perianthe 5flore, 

 terete with 5 equal segments, phoranthe with a 

 thick gland in the centre and 5 flowers around 

 it, (this gland is an abortive neutral floret some- 

 times evolved) calicule obsolete or only a small 

 scale, florets with tubular limb deeply 5d, an- 

 thers inclosed, stigmas 2 or 4 hardly exerted* 

 seeds smooth oblong or clavate, pappus downy 

 capillary, Perennials, leaves Alternate large 

 tkickish, flowers white corymbose or panicu- 

 late. A north American G. of many ep. quite 

 distinct and natural by the singular structure of 

 phoranthe, noticed by Elliot and Nuttul, the 

 central gland is variable ovate acute, or angu- 

 lar tridentate, or seldom changed into a neutral 

 floret which has then the ovary dentate instead 

 of downy. I have even noticed some flowers 

 \vhere there was only this neutral floret in the 

 perianthe, lacking anthers and sty te, another 

 anomaly is the quadruple stigmas of some florets* 

 This G. it nearer Kltinia than Cacelia, Akin 



