98 Journal of the Asiatic Sociely of Bengal. [N.S., XEX, 
Andropogum apicus. The poorly drained areas in these forests 
are covered with the Sha-Dahat Thorn Forest. 
THORN FORESTS. 
. Acacia catechu-Tectona hamiltonii Forest (Sha Dahat 
Forest). Acacia-Tectona hamiltonii hvlion (or dryon). With 
the exception of Tectona hamiltonii—which occurs mainly 
as small bushy trees—nearly all the common plants in this 
forest are armed with spines or prickles. The most important 
are Acacia catechu, A. leucophloea Willd., A. pennata Willd.. 
Limonia acidissima Linn and Harrisona bennettti Hook. ft. 
Woo ianes and prickly climbers are abundant: grass of 
the species Andropogum contortus and A. apicus is the princi- 
al undergrowth. Abundance of bamboo produces a modi- 
fication of this forest as on the Pegu clays west of Thayetmyo. 
THORN SCRUB. 
7. Acacia catechu Thorn Scrub (Sha Jungle). Acacia 
eatechu dryon. Where the rainfall is less than 35 inches, the 
Pegu clays weather into the very infertile ‘“ Kyattimye.” 
These lands, together with the gypsiferous Pegu loams further 
north and the Irrawadian sands with a rainfall centering round 
ok. f, et Thoms,, Jatropha gossypifolia Linn., and Limonia 
acidissima occur. 
Zizyphus jujuba Thorn scrub. Zizyphus jujuba conso- 
cies (or dryon). This type of vegetation develops with extra- 
allowed to lie fallow for several years Zizyphus jujuba as 
- prickly shrub or small tree is the characteristic plant. 
is 
Wall. (Saung-balwe) is very common. In the more southern 
regions numerous climbers assist in making a dense, im- 
penetrable and very thorny thicket. 
_ 9. Euphorbia Semi-Desert or Thorn-scrub. Euphorbia ere: 
mion. This type of vegetation, which is characterized by 
fleshy, thorny species of Huphorbia is found on tracts of Pegu 
rocks in the heart of the Dry Zone as at Minbu and Yenan- 
gyaung. ther common plants are Acacia eatechu, Jatropha 
gossy pifolia. Limonia acidissima and Osyris arborea Wall. The 
