322 TiMEHRI. 



tent on a large sand at the base of the hill on which his 

 house stands. 



When I found in the course of my progress that health 

 and means were sufficient for a more prolonged excursion 

 than I originally projefted, I fixed on this creek as the 

 limit, having heard of the high savannah at the head in 

 which I expefled to Botanize advantageously. Though 

 I went a day further up the river, this creek therefore 

 may be deemed the limit of my excursion, and I made 

 two trips up the creek and over the falls to the savannah 

 in question. It is situated in the range of two branches 

 of the Ekruyekuh mountains, between which the Coora- 

 Coora Creek runs in a succession of unnavigable rapids 

 for at least 20 miles. I consider the savannah 1,500, 

 and the mountains on each side 2,500 feet above the sea, 

 and I was beyond measure astonished to find at this 

 elevation the plants, with two or three exceptions, 

 exaftly the same as those common to the Demerary 

 sand hills and the alluvial creeks within the influence of 

 the tides and a few miles from the sea. The only pecu- 

 liarity worthy of remark was that plants below purely 

 parasitical (epiphytes) were here growing in whole acres 

 on the bare sands and covering boulders and cliffs of 

 granite without a particle of soil attached. Oncidium 

 and the commonest Orchidia of the creeks below were 

 thus situated, but the more choice specimens were either 

 very scarce or wanting. One Oncidium alone I charac- 

 terise as exclusively granitic, with a long pear-shaped 

 bulb, and a very elegant flower-stem 6 feet high, much 

 resembling O. altissimum, with which it is intermingled 

 in great clumps. This and the cactus I have before 

 described are the only Botanical novelties I have seeq 



