^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 

 . llibeirao 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 

 brachiatum ; Phyllanthus erythroxyloid.es, 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., salicariae folia 

 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 Spreng. ; Liihea paniculata, nob.; Clusia 

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

 iana, d c. 



