Ageratum. — Kupatorium. — Aster. 961 
var. mexicanum (Sims.) Sweet Brit. Flow. Gard. I (1823), p. 89. 
— Ageratum mexicanum Sims. Bot. Mag., tab. 2524. — Scabrous- 
puberulent, erect: leaves short-petioled, ovate to oblong-lanceolate, 
irregularly few-several-toothed: floriferous branches naked above: 
corolla-tube glanduliferous: pappus prominently cupulate, more or 
less dentate. — Flow. March to April. 
_N. v. Naturalized everywhere. 
Also known from Mexico. 
543. (3.) Eupatorium Linn. 
Involucre hemispherical, campanulate or cylindrical, the bracts 
imbricate, in 2 or more series. Receptacle flat or slightly convex, 
without scales. Flowers numerous or few, all tubular, hermaphrodite, 
5-toothed. Anthers obtuse at the base. Style branches elongated, 
obtuse. Achenes 5-angled, without intermediate striae. Pappus of 
a single series of capillary bristles. — Perennial herbs or shrubs 
or very rarely annuals. Leaves usually opposite. Flower-heads 
mostly corymbose. Green parts of the plant often sprinkled with 
resinous dots. 
A vast genus, the great majority of species being American, a few 
ranging over eastern Asia, and one extending to Europe and Australia. 
1318. Eupatorium cannabinum. L. Spec. Plant. I (1753), 
p.- 1173. — Flor. Dan., tab.745. — DC. Prodrom. V, p.180. — 
Kupatorium dicline Edgew. in Trans. Linn. Soe. XX, p. 63. — A 
perennial with erect stems of 90 cm to 1,50 m in height, slightly 
pubescent. Leaves divided to the base into 3 broadly lanceolate 
coarsely-toothed segments, often 8 or 10 cm long, those of the upper 
leaves smaller and sometimes very narrow, the upper-most leaves 
rarely undivided. Flower-heads numerous in compact terminal heads. 
Involucres cylindrical, of few unequal bracts, the inner ones often 
coloured. Florets usually 5, purple or rarely white. — Flow. February 
to May. 
N. d. Banks of the Mahmudiye-canal near Alexandria (G. Maire). 
Very common in the temperate regions of the northern hemisphere in 
the Old World. 
544, (4.) Aster Linn. 
Herbs, usually erect, with alternate, entire or toothed leaves, 
narrow linear in the British species. Flower-heads in terminal 
corymbs. Involucral bracts imbricated in several rows. Outer florets 
not very numerous, forming a purple or white spreading ray, but 
sometimes wanting, those of the disk tubular, 5-toothed and yellow. 
Muschler, Manual Flora of Egypt. 61 
