118 King & Gamble — Flora of the Malayan Peninsula. [No. 4, 



Corolla-lobes valvate ; ovules erect, on the top of an 

 erect basilar placenta ; flowers in scorpoid cymes, 

 collected in corymbose panicles ... ... 30. Jackia. 



1. MlTKAGTNA, Korthals. 



Trees with petiolate leaves and large caducous bracts and stipules. 

 Flowers sessile, crowded in globose, solitary or paniculate, pedunculate 

 capitules, each peduncle with 2 foliacious long-petioled bracts near its 

 apex : the flowers mixed in the capitules with numerous, spathulate 

 paleaceous bracteoles. Calyces conoid, densely crowded, but quite separ- 

 able from each other: the calyx-tube short, its mouth truncate or 5- 

 toothed. Corolla funnel-shaped ; the tube long, the mouth -with a ring 

 of villose hairs inside below the base of the lobes ; lobes 5, thickened 

 towards the apex, lanceolate, valvate in astivation. Stamens 5, origina- 

 tino- just above the ring of hairs ; anthers lanceolate, apiculate, cordate 

 or sagittate at the base; filaments short. Ovary 2-celledj style 

 filiform, exserted; stigma cylindric or mitriform, its base overlapping 

 the apex of the style ; ovules numerous, on pendulous placentas. Fruit 

 of two 5-ridged cocci dehiscing at the apex. Seeds numerous, small ; 

 the testa with thin wings, the albumen fleshy. — Distrib. Eight species, 

 5 of which are Indo-Malayan and 3 tropical African. 



Main-nerves of leaves 7 to 9 pairs ; corolla "2 in. long ; 



calyx-tube narrow, not ridged ... ... ... 1. M. diver sifolia. 



Main-nerves of leaves 12 to 15 pairs; corolla "3 in. 



long ; calyx-tnbe wide, ridged ... ... ... 2. M. speciosa. 



1. Mitragyna diversifolia, Haviland in Journ. Linn. Soc. XXXIII. 

 71. Young branches pale, compressed. Leaves thickly membranous, 

 ovate or elliptic, to rotund-ovate ; obtuse or sub-acute ; the base rounded 

 (in the lower leaves slightly cordate) ; both surfaces glabrous, the lower 

 minutely reticulate, sometimes puberulous especially on the nerves ; 

 main-nerves 7 to 9 pairs, rather straight, spreading; length 4 to 8 in. ; 

 breadth 2 to 6 in. ; petiole "35 to 1'25 in. ; stipules oblong, blunt. Corolla 

 •2 in. long ; tube of calyx not ridged, about "025 in. wide. Anthers cor- 

 date at the base. Stigma cylindric, overlapping the apex of the style 

 by its hollow base. Mitragyne javanica, Koord. & Valet. Bijdr. 8, 38. 

 Stephegyne diversifolia, Hook. fil. Fl. Br. Ind. III. 26. S. parvifolia, 

 Korth. Verh. Nat. Gesch., p. 161 (in part). Nauclea diversifolia, Wall. 

 Cat. 6096 : G. Don Gen. Syst. III. 467. N. rotundifolia, Roxb. Fl. Ind. 

 I. 516; Kurz For. Fl. Burra. II. 67. N. Brunonis, Wall. Cat. 6097: 

 G. Don, I.e. N. parvifolia, Roxb. var. 2, Kurz For. Fl. Burm. II. 

 67. 



Andaman Islands.—Distrib. Burma ; Chittagong ; Philippines. 



