35(1 cii. LABiAT-E (baker). [Acrocepkahfs. 



Leaves oblong-lanceolate. 

 Leaves sessile or subsessile. 



Leaves entire 31. A. Hensii. 



Leaves distinctly toothed . • . 32. ^. minor. 



Leaves shortly petioled. 



Stem slightly pilose 33. ^. elongatus. 



Stem densely clothed with spreading hairs . 34. A. angolensis. 



Leaves oblong 35. .4. divaricatus. 



Heads in panicled clusters Z6. A. paniculaius . 



1. A. xuonocephaluSy Baker. Perennial. Stem slender, flexuose, 

 slightly pubescent, ^->^ in. long. Leaves linear, sessile, denticulate, 

 spreading, 1-1 J in. long, slightly pubescent on both sides. Head single, 

 terminal, globose, U- in. diam. ; basal bracts small, ovate, greenish- 

 white, with leafy cusps ; flower-bracts rhomboid, very hairy, \ in. long 

 and broad, subacute, green with a pale base. Calyx villous, \ in. long ; 

 lips oblong. Corolla twice as long as the calyx ; lips short. 



Mozamba Blst. German East Africa : Lower Plateau, north of Lake Nyasa, 

 Thomson ! 



2. A. centratheroides. Baker. Annual. Stem short, pubescent, 

 with several long spreading branches. Leaves opposite, lanceolate, 

 sessile, dentate, pubescent, 2-3 in. long. Heads sessile at the end of 

 the main stem and branches, overtopped by the upper branchlets, 

 globose, ^-J in. diam. ; basal bracts ovate or lanceolate, very hairy, 

 green ; flower-bracts hairy, green, obovate-cuneate, J in. long. Calyx 

 as long as the bract. Corolla J in. long; tube slender ; limb short. 



Upper Guinea. LoweV Niger, Baikie ! 



3. A, galeopsifolius, Baker. Annual. Stems 1 J-2 ft. long, 

 slender, much branched, with a few short spreading hairs. Leaves 

 petioled, oblong, acute, crenate, 1 J-2 in. long, slightly hairy, cuneate at 

 the base. Heads globose, \-'^ in. diam., solitary or 2-3 approximate 

 at the end of the branches ; basal bracts lanceolate, all green ; flower- 

 bracts orbicular-cuneate, membranous, as long as the calyx. Calyx \ in. 

 long ; lips oblong. Corolla twice as long as the calyx ; lower lip J in. 

 long. 



XMLozamb. Blst. Kavala Island, in Lake Tanganyika, Carson! 



4. A. gracilis, Briquet in Engl. Jahrb. xix. 1G6. Annual. Stems 

 erect, much-branched, 1-1 J ft. long, finely pubescent. Leaves linear, 

 sessile, denticulate, finely pubescent, acute, 1-1 J in. long, narrowed to 

 the base. Heads solitary at the end of the branches, globose, ^-J in. 

 diam. ; basal bracts small, ovate, acute, green throughout ; flower-bracts 

 orbicular-cuneate, \ in. long, with long hairs on the back and edges. 

 Calyx as long as the bract ; lips oblong, shorter than the tube. Corolla 

 twice as long as the calyx. 



Xiower Guinea* Angola, JFelwitsch, 5515 ! 



o. A. succiBaefolius, Baker. Perennial. Stems erect, 1-lJ ft. 

 long, slender, glabrous below, obscurely hairy upwards, bearing about 



