56 



ff Gymnopodes, usually (i. e., leaves corticated, except 

 the first, lowest, node}. See p. 25. (Fig. 51.) 21. 

 hydropitys Reich. 



-f- Leaves in a verticil 9-12. 



1) Nuclei 280-350 long. 21 a. Indica A. Br. 



2) Nuclei 360-400 long. 



Fig. 51. 



Corticated segments of leaf, 4. 2ib. perfecta 

 A. Br. 



Corticated segments 1-3. 2ic. genuina A. Br. 

 3) Nuclei 450-480 long (Fig. 51). 2 id. septentri- 



onalis Nordst. 

 -j- -f- Leaves in verticil 8-9. 



1) Nucleus 330-380 long. 2ie. Africana A. Br. 



2) Nucleus 580-620 long (subsp. ) 2 if. brachypitys 



A. Br. (S.) 



Qj. Oj. Oj. Triplostichse ; series of cortex cells triple the number of 

 leaves. 



X Spinescent, posterior bracts developed. 22. scoparia 

 Bauer. 



XX Smooth, posterior bracts wanting. 22a. Muelleri 

 A. Br. 



