240 LABIAT (Brown). [ Orthosiphon. 
tiUpper and terminal bracts either small and incon- 
spicuous or if larger neither much coloured 
(violet in O. humilis), leaf-like, lax nor spreading, 
deciduous or persistent : 
Leaves green and pubescent (usually thinly) to 
nearly glabrous beneath ; corolla-tube 4-3 in. 
long : 
Vouer stamens not exceeding the lower corolla- 
lip ; leaves 3~$ in. long; oblanceolate or 
obovate des ve oe . (20) Pretorie. 
Lower stamens very eee Biises than the 
lower corolla-lip : 
Leaves serrate with small teeth : 
Leaves lanceolate or ovate, acute; veins 
impressed above ; corolla-tube 23-5 lin. 
long: 
titves distinctly petiolate : 
Leaves with moderately long and 
apparently outstanding hairs on 
both sides, subciliate ; peravier 
2-34 lin. long... . (23) varians. 
Leaves with very minute eel 
hairs on both sides, not ciliate ; 
petioles 1-2 lin. long... ... (24) affinis. 
Leaves narrowed to the base, scarcely 
petiolate, nearly or quite glabrous 
above, distinctly pubescent on the 
veins beneath, ciliate ss ... (25) Holubii. 
Leaves elliptic, obtuse or rounded at the 
apex; veins not impressed above ; 
corolla-tube 5-6 lin. long... +s. (26) Bolusii. 
Leaves entire, lanceolate or elliptic, finely 
puberulous on both sides; veins not 
impressed and indistinct above ... ... (27) humilis. 
Leaves densely whitish-pubescent or white- (rarely 
yellowish-) tomentose beneath, excluding the 
sometimes revolute margins : 
Tomentum or pubescence on underside of leaves 
composed of unbranched hairs : 
Leaves flat or longitudinally folded, not 
revolute at the margins, 2-12 in. Tog : 
inflorescence branched ... . (23) canescens. 
Leaves revolute at the margins, Hi in, i Aoig? ; 
inflorescence not branched : 
Entire flowering-calyx less than } in. long ; ' 
corolla-tube 34-43 lin. long... . (16) albifiorus. 
Entire flowering-calyx 3 in. or more sie : 
corolla-tube 7-74 lin. long... --» (17) decipiens. 
Tomentum on underside of leaves composed of 
very minute branched hairs ; corolla-tube 
34-9 lin. long 
Pubescence on ite calyx chiefly of Jong spread- 
ing simple or slightly branched hairs, with 
or without an admixture of (but not 
tomentose with) minute branched hairs : 
Stems 1-14 ft. high, #-1 lin. thick ; lower 
stamens twice as long as the lower 
corolla-lip ee ee ae ft eS 
