THE STEM 43 
Fie. 27.—Bulb of Tulip. 
A. Tulip plant in flower. B. Longitudinal section of bulb. C. Trans- 
verse section of bulb. wu. Anthers. g. Gyneceum, pl. Petals. 
f.l. Leaves borne on the flowering stem. (From Darwin's “ Ele- 
ments of Botany ”.) 
