107 



4. Pentacme, a, DC. 



Glabrous or pnbemlous resinous trees. Leaves broad, entire, penni- 

 nerved, with obtuse or cordate bases. Flowers large, panicled. Ctilyx- 

 tube short, the lobes imbricate, 2 being quite external. Stamens 15, 

 the filaments .short, dilated; anthers much larger than the filaments, 

 elongate, linear ; the valves 4, sub-equal, each subulate at its apex, 

 the connective also prolonged into a stiff deflexed arm as long as the 

 appendages of the anther-valves. Ovary free ; the style filiform, tho 

 Rtigma slightly lobed. Fruit enclosed within the imbricate calyx- 

 lobes, of which two or more have elongated membranous reticulate 

 many-nerved wings. Species 3, — Burmese, Siamese, and Malayan. 



1. Pentacme malatana. King, n. sp. A tree 40 to 50 feet high : 

 young branches rather stout, dark-coloured, glabrous. Leaves sub- 

 coriaceous, rotund-ovate to broadly elliptic, the apex shortly and blunt- 

 ly acuminate, the base rounded or slightly emarginate ; both surfaces 

 glabrous, pale when dry ; main nerves 15 to 18 pairs, spreading, pro- 

 minent on both surfaces ; length 5 to 7 in., breadth 275 to 4*5 in., 

 petiole "75 to 1"1 in. Panicles axillary, lax, few-flowered, 2'5 to 5 in. 

 long. Floivers "75 in. long and about as much in diameter when open, 

 pedicelled. Calyx-lobes moi^e or less broadly ovate, acuminate, minutely 

 tomentose outside. Petals three times as long as the calyx, elliptic, 

 spreading, puberulous on one-half outside, and glabrous on the other, 

 quite glabrous inside. Stamens 15, equal, erect, the filaments short and 

 broad ; the anthers elongate, narrow, with 5 apical awns, one of which 

 is deflexed and rather shorter and thicker than the other four. Ovary ovoid, 

 sub-glabrous, much shorter than the filiform style : stigma minute. 

 Pipe fruit ovate, apiculate, 1 in. long, glabrous ; calyx-wings all enlarg- 

 ed and reticulate except at the base ; the three outer narroAvly oblono-, 

 obtuse, and narrowed to the concave base, 9-nerved, 4 to 4"5 in. long, and 

 •65 to "75 in. broad ; the two inner lobes much narrower and fewer- 

 nerved, about 25 in. long, or even shorter. 



Langkani : Curtis, No. 2095. 



The petals of this species are spreading, and the flower has quite an 

 unusual fades for the order. It is at once distinguished by its curiously 

 5-awned anthers. Four of these awns are the produced apices of the 

 anther cells, the fifth (the thicker and deflected one) is a prolongation 

 from the connective. 



5. Shorea, Roxb. 



Glabrous, mealy, or pubescent resinous trees. Leaves entire or 

 sub-repand, pinnate-veined ; stipules large, coriaceous and persistent, or 

 minute and fugacious. Floivers in axillary or terminal, lax, cymose 



399 



