PLATE XXXIII. 



CHAUA CRASSICAFLIS SUBIUSPIDA LI IXIlIBRArTEATA, 



Fig. 1, Plant, uatural size. 



" 2, Stem, showing stipular wliorl, bases of leaves, ami two fertile 



nodes. x50. 

 '• 3, Carpogone with spore. x50. 

 '■ 4, 5, Cross-sections of stem; 5 a, b, spines growing from primary 



cortex-cells. x50. 



