Buchnera.] xcu. scrophulariace.e (hemsley and skan). 



375 



Spikes without long white silky 

 hairs, usually hispidly hairy. 

 Spikes up to 7 lin. broad ; bracts 

 1|— 3 lin. long ; corolla-tube 

 1-|— 3-^ lin. long. 

 Calyx 5-feoothed; corolla-tube 

 1-J-— 2-^ lin. long, more or 

 less pilose. 

 Leaves entire or rarely 

 toothed ; spikes short, 

 rarely up to 1^ in. long 10. B. capitata 

 Leaves often distinctly 

 toothed ; spikes up to 

 2J in. long . . .11. 



Calyx 4-toothed ; corolla-tube 

 about 3^- lin. long, glabrous 12 

 Spikes 7 lin. broad ; bracts 3- 

 5 lin. long ; corolla -tube 4+— 

 5 lin. long .... 

 Spikes 9 lin. broad or more ; bracts 

 3±-4£ lin. long. 

 Calyx 2i- lin. long ; 

 scarcely more than 

 long 

 Calyx 3f— 4£- lin. long 

 1-2 lin. long: . 



B. paucidentatd. 

 B. affinis. 



13. B. quangensis. 



teeth 

 \ lin. 



14. 



teeth 



15. 



B. subcapitata. 

 B, pidchra. 



§§ Spikes rather long and slender, usually 

 much longer than broad. 

 Stem leaves 2-7-^- lin. long. 



Stem leaves very few (only 1-3 pairs 

 and in B. attennata 2 or 3 odd 

 ones) ; calyx 2^—3 lin. long. 

 Bracts ovate, 1|- lin. long ; corolla- 

 tube 3 lin. long . 

 Bracts lanceolate, 5 lin. long ; 

 tube 5-6 lin. long 

 Stem leaves in several pairs ; calyx 

 only 1-1 -|- lin. long . 

 Stem leaves usually 1 in. long or more. 

 Bracts 1-2J lin. long, as broad or 

 nearly as broad as long. 

 Spikes almost glabrous : bracts 



2-2-|- lin. long . 

 Spikes rather densely hairy ; 

 bracts about 1 I'm. long 

 Bracts usually more than 2,\ lin. 

 long, much longer than 

 broad. 

 Calyx-teeth 4 . 

 Calyx-teeth 5. 



Plant nearly glabrous . 

 Plant distinctly hairy. 

 Stems leafy 

 Stems very sparingly leafy. 



l(i. 



17. 



is. 



l!t. 



20. 



21. 



22. 



23. 



B. attenuata. 

 B. rungwensis. 

 B. strictissima. 



B. ensifolia. 



B. latibracteata. 



B. crassifolia. 

 B. namiiliensis* 

 B. Welwitschii. 



