404 
LXXV. LABIATiE 
Roylea elegans, Wall. ; FI. Br. Ind. iv. 679. An erect shrub, 
3-5 ft. ; branches terete, pale brown, finely tomentose. Leaves 
shortly stalked, hairy, ovate, 1-1 1 in., crenate, acute. Flowers 
J in. long, white, tinged with pink, in axillary whorls. Calyx-tube 
cylindric, 10-nerved ; lobes 5, erect, oblong, net-veined, obtuse. 
Corolla hairy, hardly longer than the calyx ; tube cylindric ; limb 
2-lipped, upper lip erect, hood-like, entire, lower 3-lobed, spread- 
ing, mid-lobe longest, entire. Stamens 4, in unequal pairs, 
ascending under the upper lip, outer or anterior pair longer 
than the inner. 
Sutlej and Giri valleys ; May-October. — W. Himalaya, 2000-5000 ft. 
26. LEUCAS. From the Greek leucos, white ; referring to 
the flowers. — Warm regions of Asia, Africa and Australia. 
Erect, woolly or hairy herbs. Flowers white, in axillary or 
terminal whorls. Calyx tubular ; teeth 10, short, erect, equal or 
slightly unequal. Corolla-tube cylindric, included ; limb 2-lipped, 
upper lip erect, hood-like, very hairy, lower much longer, spread- 
ing, 3-lobed, mid-lobe the largest, entire. Stamens 4, in unequal 
pairs, ascending under the upper lip, outer or anterior pair longer 
than the inner. 
