PART III. | THE MECHANISMS OF FLOWERS. 323 
| The tube of each floret is 35 to 44 mm. long, the wider throat 
- into which the honey rises is 1} mm. long, so that the honey is 
_ easily accessible. The simultaneous fertilisation of numerous 
_ flowers is here rendered possible in a way different from that in 
_ Tanacetum. The branches of the style are 1} mm. long, and they 
_ bear on their outer borders a row of stigmatic papille (nm, 2) up 
_ toa point above their middle ; above this point they broaden, and 
are covered with hairs both on their outer surface and on their 
Fic, 111.—Chrysocoma Linosyris, L. 
1.—Flower, in first (male) stage. 
2.—Ditto, in second (female) stage. 
n, stigmatic papille ; p, pollen; b, brush of hairs ; a, anthers; ov, ovary. 
| Even in the second (female) stage, their tips remain in 
1? Rontact, and they only curve asunder in the middle. Insects 
creeping over the capitulum, bend down the ends of the styles 
. y with the under surfaces of their bodies, and so brush over the 
! — of many florets simultaneously. 
A. Hymenoptera—Apide : (1) Halictus flavipes, F. ¢; (2) H. albipes, ¥. 
3, very freq. ; (3) H. cylindricus, F. ¢, ab. ; (4) H. aapoemtns! K. 6, freq., 
' ls. B. Diptera—(a) Syrphide : (5) Syritta pipiens, L -; (6) Eristalis arbu- 
| rem, L.3 @) E. nemorum, L., all three species s. and f.p., very ab.; (d) 
i= ¥> 2 
