1963] 



BOTANY OF THE GUAYANA HIGHLANDS PART Y 



31 



A 



I) 



17 



18 



Fig. 15. Xyris steyermarTcii. A, sheath apex, x 7.5. B, blade apex, x 7.5. C, scape section, 

 X 7.5. D, spike, X 4. E, sepal, X 7.5. Fig. 16. Xyris frequens. A, sheath apex, x 5. B, blade 

 apex, x 5. C, scape section, x 5. D, spike, X 2. E, sepal, X 5. Fig. 17. Xyris contractu. A, 

 sheath apex, x 5. B, blade apex, x 5. C, scape section, X 5. D, spike, X 1.5. E, sepal, X 3.5. 

 F, seed, X 15. Fig. 18. Xyris frondosa. A, sheath apex, X 5. B, blade apex, x 5. C, scape 

 section, x 5. D, spike, X 2. E, sepal, X 5. 



