^70 TRAVELS IN BRAZIL. 



itself consists of white quartz-slate, which is tra- 

 versed with more or less numerous scales of mica. 

 Towards the centre of the mountain, the rock be- 

 comes of a coarser grain. The mica-slate, contain- 

 ing specular iron, and its concomitant, the pure 

 mica, stratified in large tables, form beds in the 

 lower parts of the mountain, which run- in the 

 direction from E. to W. in hour 7 of the miner's 

 compass. At the foot of the mountain, for instance, 

 at the gunpowder manufactory, the iron-stone stra- 

 tum appears, in which there are nests of iron pyrites 

 and crystals of ironglance. Lastly, a brown thin 

 foliated clay-slate forms the solid basis of this 

 mountain. Several rivulets, which flow into the 

 Ribeirao do Oiro Preto, descend from the ridge of 

 the mountain. In a retired valley there is a spring 

 containing oxyde of iron,, which, from its yellow 



obcordata, linearis ; Lisianthus pulcherrimus, inflatus, pen- 

 dulus nob., fistulosus Lam., ccerulescens Aubl.; Exacum 

 brachiatura ; Phyllanthus erythroxyloides, fastigiatus ; Cnemi- 

 dostachys myrtilloides, glandulosa, salicifolia, linearis, glauca 

 nob.; Sauvagesia erecta, L. ; Lavradia montana (lb. pi. 23.) ; 

 Plectanthera floribunda (lb. pi. 26.); Esterhazia montana, al- 

 pestris, campestris ; Angelonia lobelioides nob., salicariaefolia 

 Humb. ; Gloxinia viridiflora ; Gessneria tuberosa nob.; Glau- 

 theria odorata Humb., alpina, eriophylla; Gaylussacia aci- 

 cularis ; Vitis Idaea, crenulata, nitida, reticulata ; Escalonia 

 bicolor, glandulosa ; Vochisia elliptica, rotundifolia nob. ; Tri- 

 gonia sericea, Humb. ; Abatia tomentosa ; Hirtella ciliata 

 nob., glandulosa Sprang. ; Liihea paniculata, nob. ; Clusia 

 flava, L. ; Ternstromia clusisefolia, Humb.; Davilla brasil- 

 iana, d, c. 



