642 



A TEXT-BOOK OF BOTANY. 



V; St 



FIG. 348. Cicuta maculata (Water Hemlock): A, upper part of stern with leaves and 

 compound umbels; B, base of the stem and the thick tuberous roots; C, cross-section of 

 stem showing part of a mestome-strand and the pith with secretory cells (a), vessels (v), 

 libriform (St), pith (p); D, a flower showing petals with long inflexed summit and the five 

 stamens inserted on the disk that crowns the ovary; E, the fruit; F, fruit in longitudinal 

 section showing the two ovules; G, cross-section of a mericarp showing the six vittae or oil- 

 tubes. After Holm. 



tears, forming a more or less hard mass, which 'is brittle when 

 cold but soft and sticky at 37 C. ; the odor is distinct, balsamic ; 

 the taste bitter and acrid. It contains from 10 to 20 per cent, of a 

 volatile oil composed of d-pinene, cadinene, and other principles. 



