OF CENTRAL AFRICA. 303 



is a great annoyance to man and beast from the prickly 

 calyx (invoUicrum) ;" and by ^lajor Denliam that from 

 Aghedem to Woodie " it covered the surface of the 

 country, and annoyed the travellers to misery /' he ob- 

 serves also that the seed is called Kashcia, and is eaten, 



Panicum turgidum {Forsk. Arab., p. IS; Delile, \.m 

 Flore cVFfjijpte, J). 19, iah. 19,/. 2) is also one of the most 

 common grasses from Tri[)oli to Bornou. 



Of AcoTYLEDONES, the ouly plant in the collection is 

 Acrostichum velleum, found on the Tarhona mountains. 

 Mr. Ritchie's herbarium contains, also, a single plant of 

 the same family, namely Grammitls CeteracJi. 



The foregoing observations have extended much beyond 

 the limits which the number and importance of the plants 

 they relate to may seem to require. I still regret, how- 

 ever, that I cannot add a few remarks on such species as, 

 although not in the herbarium, were observed, either indi- 

 genous or cultivated, in the countries visited by the mission, 

 and for information respecting which I am indebted to 

 Major Dcnhani and Captain Clap})crton. But it being 

 determined no longer to delay the publication of the very 

 interesting Narrative to which the observations already 

 made will form an Appendix, I am unable at present to 

 enter on this part of my subject. 



