48 



BOTANY. 



through the internodes as separate threads of a considerable 

 thickness. 



FiQ. 31.— Fibro-vascular bundle of Castor-oil Plant, t, t, g, g, tracheary 



""""- "fj «, sieve-tissue p^""^" "^"""^ j. i. i-. i — .. ^i _ _ . 



ignly magnified. 



tissue ; M, «, sieve-tissue poorly developed ; 6, b, bast^flbres ;' °c, V. cambium' 



cells. 



82. In the fibro-vascular bundle of the stem of Indian 

 corn the central portion is composed of tracheary tissue, 

 consisting of pitted, spiral, ringed, and reticulated vessels 

 (Fig. 30, g, g, s, r, and the tissue between v — s, g — g). 

 Lying by the side of the tracheary tissue (on its outer side 



