GLANDS. 



41 



of the wild rose are abortive petals, as they do become 

 petals in the double cultivated roses. It is surely as 

 natural for the sloe or the holly to bear thorns, as for 

 any tree to bear leaves. 



Scales, Hairs, Prickles, and Thorns. a, leprous scales ; b, trian- 

 gular scales j c, star-formed scale ; d, shaggy hairs ; e, f, fringe of 

 hairs; g, star-like hairs ; h t hair fixed by its middle; i, jointed 

 and simple hair; k, simple prickles; I, bristles; m, warty; n, 

 three-pronged thorns ; o, glandular hairs ; p, ceUular hair magni- 

 fied ; q, glandular hair magnified ; r, s, the glandular tips magnified. 



GLANDS. 



WHAT are termed glands ] in plants seem to have 

 little analogy with animal glands, consisting usually of 



(l) In Latin, Glandute. 



