COMPOSITAE 571 



(a) Tribe Eupatoroideae Less. 



Style of the hermaphrodite florets cylindrical and two -branched. Stylar 

 branches ^-terete or somewhat clavate, pubescent above. 



412. Eupatorium L. 



Flowers protandrous, but few in each of the heads, which are arranged in 

 dense terminal corymbs. The stylar branches are as long as the corolla-tube, 

 and beset for their lowest fourth with a row of stigmatic papillae on each side ; 

 above this densely clothed with sweeping-hairs. Flower class SL. 



1310. E. cannabinum L. (Herm. Muller, 'Fertilisation,' pp. 318-20, 

 ' Alpenblumen,' p. 450, 'Weit. Beob.,' Ill, p. 92 ; MacLeod, Bot. Jaarb. Dodonaea, 



FIG. 190. Eupatorium cannabinum, L. (after Herm. Muller). (i) A head with four florets, in the first 

 (male) stage. (2) A single floret in the second (female) stage. From a to b each branch of the style is 

 beset with a line of stigmatic papillae on each side ; from b to c it is covered with sweeping-hairs. 



Ghent, Hi, 1891, v, 1893, vi, 1894; Hildebrand, 'U. d. Geschlechtsverhalt. b. d. 

 Compositen, pp. 16-17, Taf. I, Figs. 14-19; Kerner, 'Nat. Hist. PI.,' Eng. Ed. 1, 

 II; Warnstorf, Verh. bot. Ver., Berlin, xxxviii, 1896; Knuth, ' Bloemenbiol. 

 Bijdragen,' ' Blutenbiol. Herbst-Beob.') In this species, according to Hermann 

 Muller, each head usually contains only five, or even only four, dull-red florets. 

 As, however, there are generally several hundred such heads arranged in dense 



