Dunn — A Key to the Labiatae of China. 161 



3. Exserted part of corolla tube longer than 



the lobes . . . . . 1. trijuga. 



Exserted part shorter than the lobes ... 4. 



1. Terminal leaflet similar in shape to the side 



ones, less than twice as long .... 5. 



Terminal leaflet linear-oblong, more than 3 



times as long as the side ones . 2. yunnanensis. 



5. Upper lip of blue corolla straight ; leaflets 

 at least 7 in number ; calyx cylindric, 



3-4 times longer than broad . . 3. Bowleyana. 



Upper lip of yellow or blue corolla hooded ; 

 leaflets at most 5 or very rarely 7 ; 

 calyx campanulate, not twice as long 

 as broad . . . . 4 . miltiorrhiza. 



). Corolla tube cylindric or gradually wider 



above calyx ... . . . • 7- 



Corolla tube suddenly enlarged above the 



cal Y x • • 15. 



'. Most of the leaves widely hastate .... 8. 



Leaves not widely hastate ..... g. 



>. Corolla tube \ longer than calyx . . .5. Roborowskii. 



Corolla tube 2-3 times calyx . . .6. 



1. Leaves round in outline ..... 10. 



Leaves oblong, cordate or sagittate . . .12. 



>. Corolla tube less than twice as long as the 



campanulate calyx ... 7. campanulata. 



Corolla tube 2-3 times the calyx . . .11. 



. Calyx cylindric, half the corolla tube . . 8. cynica. 



Calyx campanulate, one-third of corolla 



tube . . . . -9- Maximowicziana. 



. Flowers in dense verticils subtended by 



large bracts ..... 10. hians. 



Flowers fewer and bracts small . . . .13. 



. Leaves tomentose beneath . . . 11. Przewalskii. 



Leaves pubescent beneath ..... 14. 



. Calyx cylindric ; leaves truncate at base . . 12. glutinosa. 



Calyx campanulate ; leaves sagittate . .13. 



, Leaves white-silky tomentose beneath, 



elliptic ..... 14. digitaloides. 



Leaves not tomentose beneath ; hastate or 



cordate ....... 16. 



Calyx cylindric, as long as the exserted part 



of corolla tube .... 15. umbratica. 



Calyx campanulate, half as long as exserted 



part of corolla tube ..... 17. 



Upper leaves truncate or sagittate at base . 16. Bulieyana. 



Upper leaves cuneate at base . . . 17. castanea s 



