'which have their Sexes dicecious. 



311 



be collected in sufficient quantity for use in making beer, it might be found to 

 supersede the use of the more bulky cones. We hope those who may favour 

 these remarks with a reading will take this notion at their own estimation. 

 If it here but serve the purpose to place pollen and cones in contrast, as to 

 the sex by which each is produced, the expression of it here will not be wholly 

 out of place. Smith, in his generic character of Humulus, in Eng. Flora, 

 iv. 240., describes that the anther opens by two terminal pores ; this little 

 point in structure we notice that the student may notice it too. Has any per- 

 son ever noticed the flower of one sex of the hop upon a plant mainly of the 

 other sex ? The structure of the flower in each sex is so different from that 

 of the flower of the other, that to find the two flowers upon one plant would 

 be a most remarkable fact in physiology. 



Urtica. diolca L. The dicecious-sca^ec? nettle, or great perennial nettle, so 

 common almost everywhere. The contrast in the appearance of the flowers 

 of the two sexes in this species is not conspicuous ; but it will prove obvious 

 to a steady look. Smith has stated it to be not dioecious without exception, 

 in the words, " flowers on one root [plant] chiefly barren, on another mostly 

 fertile." — Eyig. Flora, iv. 133. This is quite true, I think I may say, from 

 experience. 



XJrticecs § ArtocarpecB of some; ArtocarpecB of others. 



Madura aurantiaca, Broussonetia papyrifera, and i^icus carica are to be 

 spoken of under this order. The figure of a section of the fruit of Maclura 

 to be presented {fig. 47.), and a figure of the cut-leafed or true bread-fruit 



tree (fig. 4.1.) (Artocarpus incisa), and figures of the entire-leafed bread- 

 fruit tree or Jaca tree {figs. 42, 43, 44.), at command, may so fai- contribute to 



z 4 



