236 LABIAT2E. [ Obthosiphon. 



2. ORTHOSIPHON, Benth.; Fl. Brit Ind. iv, 612. 



Undershrubs or shrubs. Flowers racemose in 6-or fewer- tlowered 

 whorls, bracts small. Calyx ovoid campanulate or tubular, deflexed 

 in fruit ; upper tooth broad, membranous, margins decurrent on the 

 tube ; lateral and lower teeth distinct or shortly connate, usually- 

 subulate. Corolla 2-lipped, tube often slender, straight or incurved, 

 upper lip 3-4-fid, ; lower entire, concave. Stamens didynamous, 

 declinate ; filaments free, toothless at the base, anther-cells confluent. 

 Disk usually gibbous. Ovary 4-partite, style with a minute capitate 

 or clavate entire or notched stigma. Nutlets dry, ovoid or globose, 

 smooth or nearly so, basal scar small. Species about 60, in the 

 warmer regions of the Old World. 



Corolla-tube about as long as the calyx . 1. O. pallidus. 



Corolla-tube twice as long as the calyx . 2. 0. rubicundus. 



1. O. pallidus, Royle Mss. ex Benth, in Hook. Bot. Misc. Hi, 370 ; 

 F. B, I. iv, 613 ; Train Beng. PI. 844 ; Cooke Fl, Bomb, ii, 442. 



A low diffuse under shrub, 6-12 in high; branches many from a woody 

 root-stock, 4-angular, finely pubescent or Bubglabrous. Leaves petioled, 

 not scented, §-l£ m - long, ovate, obtuse or acute, coarsely serrate or cre- 

 nate, glabrous or sparingly hairy ; base cuneate, entire, petiole |-§ in. 

 long. Racemes rather short ; whorls distant, 6-flowered ; bracts minute, 

 hairy ; pedicels about as long as the calyx in flower, hairy. Calyx | in. 

 long, enlarging to twice as long in fruit, hairy below ; upper lip with 

 3 obtuse lobes ; lower lip membranous, strongly parallel-nerved, the 

 2 central teeth narrowly lanceolate and ending in a long up-curved 

 awn exceeding the upper lip ; lateral teeth broadly lanceolate and with 

 short straight awns. Corolla white or lilac, i in. long, tube about as 

 long as the calyx ; upper lip shorter than the rounded and concave lower 

 lip. Nutlets subglobose, smooth, pale-brown. 



Sub-Himalayan tracts of N. Oudh (Duthie), Banks of the Jumna (Royle), 

 Lucknow (T. Anderson), Bundelkhand. (Duthie). Flowers in July. 

 Distrib. Throughout the greater part of India from Kashmir and 

 the Punjab to W. Behar and southwards to Travancore ; extending to 

 Gilgit, Baluchistan, Aden and Arabia. 



2. O. rubicundus, Benth. in Wall. PI. As. Bar. ii, 14 ; F. B. I. iv, 614 ; 



Prain Beng. PI. 844. 0. virgatus, Benth. I.e. Ocimum tuberosum. Roxb. 

 Fl. Ind. Hi, 18. Plectranthus rubicundus, Don Prod. 116. 



An erect perennial herb with a woody often tuberous rootstock. Stems 

 slender, 1-2 ft. high, 4-angled, pubescent or glabrate. Leaves usually ses- 

 sile, 2-4 in, long, ovate or ovate-lanceolate, coarsely crenate or serrate, 

 base cuneate. Flowers in rather distant whorls, bracts minute. Calyx 



