1963] 



BOTAXY OF THE GUAYANA HIGHLANDS — PART V 



1 I 



A B 



Fig. 1. Xyris erythema. A, sheath apex, X 5. B, blade apex, X 5. C, scape section, x o. 

 D, spike, X 2. E, sepal, X 5. F, seed, X 20. Fig. 2. Xyris cryptantha. A, sheath, X o. B, 

 blade apex, x 5. C, blade section, x 5. D, spike closed, X 3. D', spike open, x 3. E, sepal, X 5. 

 Fig. 3. Xyris thysanolepis. A, sheath apex, x 5. B, scape section, x 10. C, blade apex, x 10. 

 D, spike, X 3. E, sepal, X 5. F, seed, X 40. Fig. 5. Xyris riparia. A, sheath apex, x 5. B, 

 blade apex, x'5. C, scape section, x 5. D, spike, x 3. E, sepal, X 5. 



