446 



BOTANICAL GAZETTE 



[NOVEMBER 



Pedicel 



rectangular 



Ay 2 



mes 



— The epidermis is made up of longitudinally elongated 

 cells with straight, pitted walls. Occasional simple 



stomata are present. 

 Subepidermis . — A 

 few layers of small 

 thin-walled paren- 

 chyma form this 



tissue. 



Bast. — The con- 

 spicuous elements 

 - — end constituting the bulk 



of the pedicel are the 



Fig. 2. — Pericarp in cross-section: epi, epicarp; , + £k THpv 



cr, crystal cells; hy 1 , projections of hypoderm; hy 2 , 

 hypoderm; mes, mesocarp; end, endocarp; X 160. 



# 



are greatly elongated 

 thick-walled cells 



with occasional characteristic cross-striations resembling joints, 

 and conform in general structure to the bast fibers of the stem, 

 which yield the linen of 

 commerce. 



The xylem contains 

 spiral and pitted vessels, 

 wood fibers, and paren- 

 chyma cells without dis- 

 tinctive features. 



None of the tissues 

 of the calyx and pedicel 

 is of especial diagnostic 

 importance. 



Pericarp (figs. 2 



and 3) .—The epicarp p i G - 3 — Elements of pericarp in surface view: 



{epi) consists of a single ft e / icarp; 7 cr > ?**? cells; *' P~jecticms of 



hypoderm; hy 2 , hypoderm; mes, mesocarp; em, 



layer of collapsed cells endocarp; X160. 

 whose outlines are 



most 



easily in surface view. They are frequently longi- 

 tudinally elongated to about twice their width, have straight thin 

 walls, and occasionally yellowish contents which harden at matu- 

 rity, retaining the shape of the confining cell walls. Collin and 



