346. THE FERTILISATION OF FLOWERS. [PART 1 L 
In this species there exist female and hermaphrodite plants 
with a close series of intermediate forms. The seeds of the female 
flowers are larger than those of the hermaphrodite." 
257. CENTAUREA JACEA, L.—The capitulum contains as a rule 
from sixty to over a hundred florets; in these the tubular part of 
Fic, 115. 
1—4,—Centaurea Jacea, L. 
1.—Upper part of the flower, in first stage (x *). 
2.—Ditto, in second stage. 
3.—Section of anther-cylinder, before the pollen has been shed. : ; 
; ‘ie oe of style, removed from the anther-cylinder, and divested of pollen, to show the fine 
iairs, 
5.—Centaurea Cyanus, L. End of style, more magnified. 
a, anther-cylinder; b, valvular appendages of the anthers, which at first close the ee 
anther-cylinder; ¢, pollen; d, style; e, ring of sweeping-hairs ; f, division of the style ; 9,8 
surface ; h, hairs (teeth) upon the filaments, to guard the honey. 
of the 
granie 
the corolla is 7 to 10 mm. long, the expanded bell-shaped part: 
3 to 4 mm, long, and the long, linear segments about 5 mm. long. 
The capitulum is only 8 to 10 mm. in diameter on a level with the 
’ Sir J, Smith, Trans. Linn. Soe. xiii. p, 600, quoted by Darwin, No, 167. 
