J566 



CII. LABIAT.E (baker). 



[Ortkosiphon. 



fff Leaves with a long petiole. 



Corolla-tube rather longer tban the calyx 

 Corolla-tube half as long again as the calyx. 

 Calyx finely pubescent. 



Leaves acute ..... 



Leaves obtuse ..... 



Calyx densely hairy .... 



Corolla-tube twice as long as the calyx. 



Leaves oblong-lanceolate .... 



Leaves ovate, acute. 



Petiole much shorter than the blade 

 Petiole nearly as loug as the blade 

 Leaves ovate, obtuse .... 



•■-•"■Stamens exserted beyond the lips of the corolla. 

 Bracts minute, deciduous. 



Corolla a little longer than the calyx. 



Leaves oblong-lanceolate .... 



Leaves oblong ..... 



Leaves cordate-ovate .... 



Corolla more than twice as long as the calyx. 

 Leaves sessile, linear .... 



Leaves petiolate, oblong-lanceolate 

 Upper bracts crowded, persistent. 

 Annuals. 



Raceme short ...... 



Raceme long ...... 



Perennials. 



Stems finely pubescent. 



Corolla-tube short .... 



Corolla-tube half as long again as the calyx 

 Corolla-tube twice as long as the calyx . 

 Stems very hairy ..... 



25. O. ISchimperi. 



26. O. somalensis. 



27. O. Hildehrandtii. 



28. O. coloratus. 



38. O. schinzianus. 



39. O. hracteosus. 



40. O. Marquesii. 



41. O. Welwitschii. 



42. O. Kirkii. 



43. O. miiottii. 



1. O. tuberosus, Briquet in Eiujl. Jahrh. xix. 172. Perennial. 

 Root-fibres wiry, thickened into obloug tubers. Stems tufted, short, 

 erect, simple, slender, densely pubescent. Leaves small, sessile, entire, 

 oblong or lanceolate, pubescent on both sides. Whorls 2-flowered, 

 forming a lax, terminal raceme; bracts minute; pedicels pubescent, 

 i in. long. Calyx pubescent, }. in. long; tube campanulate ; upper 

 tooth small, ovate, shorter than the tube ; lateral and lower small 

 cusps. Corolla-tube twice as long as the calyx ; lobes small. Stamens 

 not exserted 



&ower Guinea. Angola: province of Huilla, Welwitsch, 54:741 



2. O. tenuiflorus, Benth. in DC. Prod. xii. 50. A low much- 

 branched perennial, with woody main stems and slender pubescent 

 branchlets. Leaves sessile or shortly petioled, firm, small, narrow, 

 obovate-cuneate, crenate, pubescent. Whorls few-flowered, forming lax 

 terminal racemes ; bracts minute ; pedicels shorter than the calyx, 

 pubescent like the rhachis. Fruit-calyx ^ in. long ; tube campanulate, 

 strongly ribbed ; upper tooth orbicular, shorter than the tube ; lateral 

 teeth small cusps ; lower large cusps. Corolla white, more than twice as 



