STAMENS. 



87 



place where a petal narrows into its stalk or " claw ", a little yellow swelling or 

 callosity may be seen; this may be regarded as a reduced anther, and now and then 

 it possesses the character of an anther, and contains actual pollen. It is frequently 

 observed in double flowers that a multiplication of the leaf accompanies the con- 



Fig. 214.— stamens. 



' Ewpleurumserrulalum. ' Hypericum olympicum. > Juglans regia. * Soldanella ttlpina. ' Violaodorala. ','' Artemisia 

 Absynthium. « Haminia (.ifter Baillon). 9 Abies excelsa. "> Euphorbia canariensis. ", 12 Plalanus orientalis. 

 ^^, ^^ Juniperus Sabina. ^^ Halicmocnemis gibbo&a-, ^^ Halantium Knlpianum. ^T Sajiguinaria canadensis. '^^ Allium 

 sphcerocephalum. i' AcUea spicata. '« Aconitum Napellus. ^^ Salvia officinalis. ^^ Viscum album. "^^ Mirabilis 

 Jalapa. 2* Tilia ulmi/olia. -s Thymus serpyllum. 26 Acalypha (after Baillon). 2' Bryonia dioica. !» Eicinus com- 

 munis. •' Corydalis capnoides. '' Polyyala amara. 3' Dori/pAora (after Baiilon). »'' Paris quadri/olia. (Ali figures 

 somewliat enlarged.) 



version of stamens into petals. In the place of a single stamen we may find two 

 stamens partially converted into petals, or there may be a greater number of petal- 

 like leaves, standing one behind another, oi", finally, we may have the appearance 

 shown in figs. 213^ and 213* of a double Primula. 



By the action of parasitic Aphides and Insects stamens often assume a leaf- 

 like appearance, they become green like the carpels described on p. 80. Such 

 instances are of value in comparing the various parts of a stamen with those of the 



