EXPLANATION TO PLATK V. 



Fie;. 1. riiniiiilariii inermis Nutting (enlarged). 



\>. I'liimiiltirin iiK-rmis. HydmtliiTa and liydraurh (greatly i-nlar^cil i. 



I'D. riuiHiilaria iiK-nii'm. Hydmtliri-a (greatly enlarged. 



3. I'liiiniilarid miilitliecH Fewkes. Portion of .stem (enlarged). 



I'liiiiniliii-id <-uiilitlii-i-a. Portion ol' h.vdi-iicladiuin (enlarged). 



I'litm-iilnria rtiulitlii'i'a. H\ drotli'-ral iuternode (greatly cnlargrd). 



riiimiilnriii allenuata Alluiau (enlarged). (After Allman.) 

 IfiO 



