78 
NKOBQT. 
and Georgia, nearer to M. cyan anther a than 
M. angusufolia , 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 . 
pmnila now my G. Tkerolepta Neog. 1825. 
JEUPATQR1UM and akin 
This extensive G. is now divided into many 
Celestina, Briekellia , Mikania , Kahnia &c, 
besides my Eutrochiurn with scariose terete 
perianthe, leaves verticillate &c,my Caradesia 
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, 
Mesadenia and Hasteola. 
935. 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 
thickish , flowers white corymbose or panicu- 
late. — A north American G. of many sp. quite 
distinct and natural by the singular structure of 
phoranthe, noticed by Elliot and Nutful, 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 
where there was only this neutral floret in the 
perianthe, lacking anthers and style, another 
anomaly is the quadruple stigmas of some florets, 
This G. is nearer Kleinia than Cacalia . Akin 
