120 ENGLISH BOTANY. 



llie female. Pericline f to ^ inch long in the suh-male, i to :|; inch 

 in the female plants. Phyllaries suh-scarions at the margins, gene- 

 rally purplish, longitudinally veined. Corolla pale reddish-purple 

 in the suh-male florets, with a hell-shaped limb, — in the female 

 very slender ; and the latter have the branches of the style also 

 more slender. Pappus white, longer than the yellowish-brown 

 cylindrical achenes. Plant dull-green ; the scapes generally pur- 

 plish, decaying early in the sub-male plant, which rarely produces 

 seed. 



M. Jordan divides this into two, P. riparia and pratensis : of 

 these I have not seen authentic specimens, but, judging from the 

 descriptions, the British plant (so far as I have seen) is P. riparia. 



Common Butter-bur. 



French, TussUage Petadte. German, Gebrauc}dic7ie Neunkrafi. 



Tribe X.— EUPATORIEiE. 



Leaves opposite, more rarely verticillate or alternate. An- 

 thodes almost always homogamous and discoid. Florets generally 

 all tubular and perfect, or more rarely the exterior ones female 

 and tubular, or very rarely female and ligulate. Anthers without 

 basal appendages. Style with the branches usually much elongated, 

 obtuse or clavate, with the stigmatic lines inconspicuous, termi- 

 nating near the middle of the branches of the style, not confluent. 

 Pappus generally present, consisting of rough or plumose hairs, 

 more rarely of chaffy scales or crown-like. 



GENUS XZVII.—E UPATORIUM. Toumef. 



Anthodes homogamous and discoid, 3- or many - flowered. 

 Pericline cylindrical or bell-shaped ; phyllaries few, imbricated. 

 Clinanth flat, naked. Florets all perfect, cylindrical - funnel- 

 sliaped. Styles with very long pubescent branches, which are 

 stigmatiferous only below. Achenes 5-angled-prismatic. Pappus 

 of denticulate hairs, arranged in a single row. 



Perennial herbs, with the leaves generally opposite or verti- 

 cillate, more rarely alternate, frequently sprinkled with resinous 

 dots. Anthodes small, generally ari'anged in compound corymbs, 

 more rarely in panicles ; florets white, pink, purplish, or blue. 



This genus of plants is supposed to be named after Eupator, a surname of Mith- 

 lidates, king of Pontus, by whom the plant was introduced as an alexiiiharniic 



