1903.] King & Gamble — Flora of the Malayan Peninsula. 115 



Miq. El. Ind. Bat. II. (1856) 121; Koord. & Val. Boomsoort. Java in 

 Mededeel. 'sLands Plant. XXXIII. (1900) 43. 



Perak : Wray 1496, at 4900 feet on Ulu Batang Padang. Distrib. 

 Sumatra; Java. 



Nat. Ord. L1X. RUBIACE^E. 



Trees, shrubs or herbs, erect, climbing, twining or prostrate, un- 

 armed or spinous. Leaves simple, opposite, usually quite entire; 

 stipules inter- or intra-petiolar, free or united to each other or to the 

 petiole ; in the tribe Galiese leaf -like and forming a whorl with the 

 leaves. Inflorescence various. Flowers usually hermaphrodite, mostly 

 regular and symmetrical. Galyx-tube adnate to the ovary : its limb 

 various, sometimes petaloid. Corolla gamopetalous, regular, usually 

 4-5-lobed, rarely bilabiate; the lobes of the limb valvate, imbricate or 

 contorted. Stamens equal in number to the lobes of the corolla, sessile 

 or on short or long filaments ; anthers 2-celled, usually linear, dorsifixed, 

 and dehiscing longitudinally, rarely with porous dehiscence. Dish 

 epigynous, usually annular or cushion-shaped, sometimes lobed, or 

 reduced to glands. Ovary inferior 1 , 1-10-celled ; style simple or cleft 

 (but rarely cleft to the base) ; stigmas various, usually on the style- 

 arms, but sometimes connate and fusiform, oblong, capitate or rui triform 

 and simple or lobed. Ovules in the ovarian cells solitary or in pairs, 

 or numerous. Fruit capsular, baccate, drupe-like, 2-10-celled, or 

 dehiscing into 2 or more dehiscent or indehiscent cocci. Seeds various, 

 with horny albumen; embi'yo straight or curved; cotyledons flat or 

 semi-terete ; radicle superior or inferior. — Distrib. About 4,800 species, 

 chiefly tropical and sub-tropical. 



Ovules numerous in each cell of the ovary : — 



Fruit dry, capsular or separating into 2 or 4 cocci: — 

 Flowers collected into dense globular heads : corolla 

 funnel-shaped, its lobes valvate or imbricate in bud : 

 stigma simple : — 



Lobes of the corolla valvate ... ... 1. Mitragyne. 



Lobes of the corolla imbricate : — 



Tubes of the calyces concrete ... ... 2, Sarcocepiialus. 



Tubes of the calyces free : — 



Seeds not winged ... ... ... 3. Antiiocephalus. 



Seeds winged : — 

 Trees :— 



Capitules solitary or few ... ... 4. Nauclea. 



Capitules numerous, small ... ... 5. AblNA. 



Climbers : — 



Capitules usually solitary, axillary, on 

 peduncles curving into hooks when in 

 fruit ... ... ... ... 6. Uncaiua. 



