OBTOOSIPHON. ] LAKIATM. 237 



hairy, lower lip with 4 subulate teeth. Corolla white or pink, - in. 

 long, its tube twice as long as the calyx. Nutlets suborbicular, com- 

 pressed, punctulate. 



Not uncommon in the Sub-Himalayan tracts from Dehra Dun and the 

 Siwalik range eastwards. Flowers April June. DISTRIB. W. Hima- 

 laya from Kashmir to Nepal ascending- to 5,00 ; 1 ft., and from W. Bengal 

 to the Nilgiri Hills, extending to Upper Burma and China. Specimens 

 obtained by Duthie's collectors in the Bahraich District of N. Oudh 

 are furnished with large fusiform root-tubers similar to those of Ruellia 

 suffruticosa and of other undershrubs which become modified by the 

 action of periodical fires. This is probably Boxburgh's Ocimum tubero- 

 sum. Bentham's Orthoaiphon virgatus has taller stems much narrower 

 leaves and shorter racemes ; the whorls also are more remote and 

 fewer-flowered, the calyx is coloured and the corolla is smaller. This 

 form was found by Wallich at Gorakhpur ; it occurs also in Dehra 

 Bun (Duthie) and up to 3,090 ft. in Kumaon (S. and W.), and was 

 collected by Collett in Upper Burma. 



3. ACROCEPHALUS, Benth. ; PL Brit. Ind. iv, 611. 



Annual or perennial herbs. Leaves small, opposite ..or whorled, 

 petioled. Flowers very small, sessile ; whorls in terminal or axillary 

 globose or ovoid dense heads with imbricate bracts. Calyx 2-lipped, 

 ovoid, tabular in fruit, base gibbous ; upper lip flat, usually entire, 

 lower-entire or 4-toothed, throat naked, Corolla small, somewhat 

 2-lipped upper lip subequally 4-lobed ; lower entire scarcely longer 

 than the upper. Stamens didynamous, declinate ; filaments free, 

 included, toothless. Disk small, gibbous. Ovary 4-partite. style 

 shortly 2-fid. Nutlets dry, smooth, basal scar small. Species about 

 40, in Trop. and Subtrop. Asia, also in Trop. Africa and in 

 Madagascar. 



A. capitatus. Benth. in Wall. PL As. Ear. ii, 18 ; Royle III. 301 ; 

 F. 8. I.iv, 611 ; Collett PL. Siml. 384 ; Prain Beng. PL 844; Cooke 

 FL Bomb. ii. 443. 



An annual, 6-12 in. high. Stems simple or branching from the base, bluntly 

 4-angled, glabrous or nearly so. Leaves glabrous, -l in. long, ovata 

 or lanceolate, subacute, coarsely serrate, tapering at the base and often 

 decurrent into an obscure petiole. Heads |-f in. in diam., globose or 

 ovoid, often with 2 spreading leaves at the base, peduncles 4-angled. 

 Whorls close ; bracts shorter than the fruiting calyx, broadly obovate, 

 shortly acuminate, base cuneate. CaZya? (in flower) ^ in., long, elongat- 

 ing in fruit, hairy outside ; upper lip oblong, entire, rounded at the 

 apex ; lower lip shorter, 4-toothed. Corolla % in. long, pale-purple. 

 Nutlets oblong-ellipsoid, compressed, dark-brown when ripe. 



