MORPHOLOGY OF HIGHER PLANTS. 



407 



FIG. 235. Inner morphology of flower of Primula officinalis: A. papillae on stigma 

 of flower with long styles; B, papillae from stigma of flower with short styles; C, sec- 

 tion through petals showing papillose epidermal layers and branching cells of mesophyll ; 

 D. section through corolla tube showing glandular hairs on epidermis; E, surface view of 

 epidermal cells of petals, those of the corolla tube being elongated and shown on the left, 

 while those of the outspreading petals are polygonal and striated from the folds in the 

 papillae; F, a pollen grain. Redraw* by Haase from drawing of Hans Kramer <'n Ber. 

 d. d. pharm. Ges., 1907, p. 352. 



