U S. NATIONAL MUSEUM 



BULLETIN 186 PLATE 6 



The Peak Doi Chiang Dao. a Remarkable Geological Formation 



A, This massive block of limestone rises more than f>,000 feet above the plain; ai its summit 

 grow representatives of such temperate genera as Primula, Gentiana, Androsace, Coton- 

 taster, and Delphinium; the type of (Jarru/a.x e. schislaceus was taken at the top of the 

 peak farthest to the left. B, A hill village situated in a hai; the blooming plant in the 

 foreground is ya muang wai {Eupatorium vduratum), a native of Brazil; this clump is the 

 type locality of Potamorhinus e. celatus. C, View from the ridge west of I he same village; 

 in these pines were found Parus major and Siphia s. aestigma. 



