404 XXIII. LEGUMINOSAE 



Dendrocalamus strictus, while Batnbusa Tulda is also found in dry forest, 

 though it extends also into the moister sub-types. Other typical bamboos of 

 the upper mixed deciduous forests are Banibusa polymorpM, Cephalostachyum 

 pergracile, Oxyteimiithera alhociliata, Dendrocalamus lo7igis2)atJms (moist valleys 

 in the Pegu Yoma), and Thyrsostachys Oliveri (Upper Burma). The pj'inkado 

 probably reaches its finest development in upper mixed forest of the moister 

 sub-type, in which Bambusa polymorpJm grows in greatest luxuriance. In the 

 Pegu Yoma some of its more important associates in the upper mixed type 

 are Tectona grandis, Lagerstroemia Flos-Reginae, L. tomeiitosa, L. villosa, 

 Homalium tomentosum, TermijiaUa tomentosa, T. Chebula, T. pyrifolia, Sterculia 

 spp., Adina cordifolia, A. sessilifolia, Stephegyne diversifolia, Bomhax insigne, 

 Spondias majigifera, Odina Wodier, Dalbergia cultrata, D. ovata, Pterocarpus 

 macrocarpus (in dry forest), Cassia Fistula, Alhizzia odoratissima, Acacia 

 Catechu (in drier types), ScJdeichera trijuga, Berrya Ammonilla, Eugenia Jam- 

 holanu, Gmelina arhorea, Vitex pubesceris, V. glabrata, Premna tomentosa, and 

 Ajiogeissus acumiiiata. In moist types verging on evergreen forest Diptero- 

 carpus alatus makes its appearance, while in the drier types approaching 

 indaing in character the most important trees are Pentacme suavis and Shorea 

 obtusa. There is a further variety of dry forest without bamboos, exemplified 

 in parts of the Pegu Yoma, locally known as thitkyin forest, which is charac- 

 terized by an extremely plentiful advance growth of pyinkado, and in which 

 the most characteristic species, apart from Xylia, are Tectona grandis, Ter- 

 minalia tomentosa, Homalium tomentosum, and Lagerstroemia Flos-Reginae. 



In the Chindwin drainage most of the above-mentioned species are also 

 found. In the southern part of this drainage Acacia Catechu and Pterocarpus 

 macrocarpus are fairly common. The chief bamboos are Ceplialostachyum 

 pergracile, Dendrocalamus strictus, Bambusa Tulda, and Dendrocalamus Bran- 

 disii. Bambusa polymorpha is very rare and local. 



In the Ruby Mines district pyinkado, though somewhat local, is plentiful 

 in some localities. It is found in three main types of forest : (i) on fertile 

 sometimes rather dry slopes with Tectona grandis, Terminalia tomentosa, 

 T. Chebida, Vitex pubescens, V. alata, Pterocarpus nmcrocarpus , Anogeissus 

 acuminata, Adina cordifolia, Pentacme suavis, Odina Wodier, Sterculia versi- 

 color, 8. villosa, &c., the chief bamboos being Dendrocalamus strictus, Thyrso- 

 stachys Oliveri, and Ceplialostachyum pergracile ; (ii) on flats in bends of streams 

 with Tectona grandis, Lagerstroemia Flos-Reginae, Tetrarneles nudiflora, Adina 

 cordifolia, Anogeissus acuminata, Terminalia tomentosa, and Pterocarpus macro- 

 carpus, the chief bamboos being Bambusa Tulda and Oxytenanthera albociliata, 

 and there is often a dense undergrowth of thorny climbers ; (iii) in poor open 

 bamboo forest, chiefly of Dendrocalamus strictus, and occasionally Thyrsostachys 

 Oliveri and Ceplialostachyum pergracile, on dry shallow soil, where the trees 

 attain small dimensions ; here the principal associate species are Terminalia 

 tomentosa, T. Oliveri (in drier parts), Pterocarpus macrocarpus, Diospyros 

 burmanica, Acacia Catechu, Adina cordifolia, Odina Wodier, and others, and 

 there is often a dense thorny undergrowth of such shrubs as Harrisonia 

 Bennettii and Cratoxylon prunifolium. 



In the Madaya drainage of the Mandalay district pyinkado is associated 

 with numerous deciduous species, such as Tectona grandis, Pterocarpus macro- 



