Orthosiphon.| LABIAT& (Brown). . 239 
Leaves almost glabrous to the eye, slightly 
rough to the touch on both sides ; corolla- 
tube 3-lin. long... ies isd ... (3) macranthus. 
Leaves mostly linear with very revolute margins, a 
few sometimes ovate, less than in. long... (18) subvelutinus. 
+{Lateral and lower (rarely only the lower) calyx-tecth 
bristle-like, flat only at the base: 
{Upper and terminal bracts rather large and very 
conspicuous, coloured, somewhat _leaf-like, 
usually lax, spreading, the uppermost often 
without flowers in their axils, persistent (see 
also O. humilis) : 
Flowering calyx-tube } in. long (larger in fruit) ; 
leaves 14-3 in long, }-$ in. broad, sessile, 
narrowly lanceolate... wie aie .-- (11) bracteosus. 
Flowering calyx-tube 4-3 in. long: 
Leaves of main stems 2-3 in. long, 1-1} in. 
broad, elliptic-lanceolate ; corolla-tube about 
S lin’ long“... ee ss 2h (4) foliosus. 
Leaves of main stems 3-2 in. long, }-? in. 
broad : 
Corolla-tube 9-10} lin. (or more ?) long, very 
slender ; leaves densely tomentose with 
stellately branched hairs on both sides... (13) Gerrardi. 
Corolla-tube 6-8 lin. long : 
Leaves flat, not white-woolly beneath : 
Stems 1-3 ft. high, 1-2 lin. thick ; 
leaves ovate or lanceolate, with very 
prominent subparallel rib-like veins 
beneath bis ve cen ... (5) transvaalensis. 
Stems 3-1 ft. high, about } lin. thick ; 
leaves cuneately obovate or oblanceo- 
late, veins scarcely or but slightly 
prominent beneath ... Ye: ... (7) Maddii. 
Leaves with revolute margins, linear or 
linear-lanceolate, white-woolly with 
simple hairs beneath ... ees ... (17) decipiens. 
Corolla-tube 3-5 lin. long: _ : 
Leaves lanceolate, white- or greyish- 
tomentose on both sides Sie .-- (12) Elliottii. 
Leaves lanceolate, green above, greyish- 
white with minute dense tomentum 
beneath ... a fe rs ... (14) stenophyllus. 
Leaves lanceolate or elliptic, green on both 
sides, no dense tomentum : é 
Bracts with long tapering acute points; 
lower stamens much longer than the 
lower lip of the corolla... «s+ (8) Thorncroftii. 
Bracts acute, not long-pointed ; lower 
stamens not exceeding the lower lip : 
of the corolla... ius ie +. (10) Rogersii. 
