CELL-CONTENTS AND FORMS OF CELLS. 209 



FlG. 115. Idioblasts containing tannin and anthocyanin: A-D, idioblasts in primary 

 cortex of root of Corydalis ochroleuca, showing a short, thin-walled cell with reddish sap 

 (A, t), and a long fiber with yellowish content (A, e) ; three short, thick-walled idioblasts 

 (B) with a reddish cell-sap; a short fiber with yellowish contents (C) and transverse sections, 

 through an idioblast (D), showing the thick, porous walls. E, a portion of an idioblast, 

 with thick, porous walls, from the pith of Fumaria muralis. F to H, idioblasts in Parnassia 

 palustris; F, portion of epidermis of leaf showing 5 idioblasts (t) with colorless but highly 

 refracting tannin content; G, portion of epidermal layer of corolla tube with reddish an- 

 thocyanin idioblasts (t); H, portion of epidermal layer at the base of corolla tube with 

 very long idioblasts (t) containing a red-colored cell-sap. After W. Zopf, "tJber die 

 Gerbstoff- und Anthocyan-Behalter der Fumariaceen und einiger anderen Pflanzen," 

 in Bibliotheca Botanica. 



14 



