1893.] Cr. King — Materials for a Flora of the Malayan Peninsula. 87 



Materials for a Flora of the Malayan Peninsula. — By George King, M. B., 

 LL. D., F.R.S , C.I.E., Superintendent of the Royal Botanic Garden, 

 Calcutta. 



[Read June 7th]. 



No. 5. 



Order XVI. DIPTEROCARPE^. 



Resinous trees, rarely climbing shrubs. Leaves alternate, simple, 

 quite entire, rarely sinuate-crenate, penni-nerved, the main nerves 

 bold ; stipules usually small and inconspicuous, sometimes larger 

 and persistent, or fugitive, leaving an annular scar, (absent in 

 Ancistrocladus) . Flowers in few- or many-flowered, axillary and terminal 

 racemes or panicles. Bracts usually minute or 0, rarely larger and 

 persistent. Sepals free, or cohering into a tube surrounding but free 

 from, or more or less adnate to, the base of the ovary and fruit. Petals 

 contorted, connate at the base, or free. Stamens oo, 15, 10 or 5, hypogy- 

 nous or sub-perigynous, free, connate, or adnate to the petals ; filaments 

 short, often dilated at the base ; anthers 2-celled, the outer valves 

 sometimes larger, connective often aristate or with an obtuse append- 

 age. Ovary slightly immersed in the torus, usually 3- rarely 2- or 

 1-celled ; style subulate or fleshy, entire or with 3 minute stigmatic 

 lobes ; ovules anatropous, 2 in each cell, pendulous or laterally affixed 

 (solitary and erect in Ancistrocladus) . Fruit usually nut-like, its peri- 

 carp leathery or woody, 1- rarely 2-seeded, surrounded by the variously 

 accrescent calyx of which two or more sepals or lobes are usually developed 

 into linear wings. Seed exalbuminous (albumen fleshy and ruminate in 

 Ancistrocladus) ; cotyledons fleshy, equal or unequal, straight or more 

 or less plaited and crumpled, sometimes lobed ; radicle directed towards 

 the hilum, usually included between the cotyledons. — Distrib. Confined 

 (except a few Tropical African species) to Tropical Eastern Asia; 

 genera about J 8, species about 250. 



Sect. I. Eu-Dipterocarpe^. Ovaries 3-celled, each cell 2-ovuled : 

 stigmas united, more or less 3-lobed : seeds usually exalbuminous 

 the outer segments of the fruiting calyx usually enlarged : trees 

 or erect shrubs, mostly stipulate. 

 Fruiting calyx with 2 or more of its segments 

 or sepals produced into long membranous, 

 reticulate, nerved wings much longer than 

 the fruit ; pericarp leathery, (woody in some 

 sp. of Shorea). 

 J. ii. 12 



