.Striga.] xcn. scrophulariace^e (hemsley and skan). 401 



Corolla-tube much inflated at the 

 throat ; calyx-teeth narrowly del- 

 toid, about 1 lin. long . . . 9. S. glandulifera. 

 ff Corolla-tube curved at the middle. 



Corolla-limb 9-15 lin. in diam. . . . 12. S. hermonthica. 



Corolla-limb 4-6 lin. in diam .... 13. S. senegalensis. 

 fft Corolla-tube almost straight . . . . 23. S. Wameckei. 



** Calyx 10-17-ribbed. 



t Spikes usually loosely (lowered, often long and 

 slender, or the flowers in the axils of the upper 

 leaves. 

 X Calyx 10- (rarely 11-13) ribbed. 



Plant hairy, with distinct leaves usually 

 6 lin. Ions: or more. 

 Leaves usually linear and about 6-12 I'm. 

 long ; flowers numerous, in dense or 

 loose spikes ; corolla-tube 4—7 lin. 

 long. 

 Flowers mostly opposite in relatively 

 stout often dense spikes; corolla- 

 limb 6-9 lin. in diam. . . 14. S. elegans. 

 Flowers mostly alternate in very 

 slender loose spikes ; corolla-limb 

 about 3 lin. in diam. . . . 15. S. lutea. 

 Leaves usually lanceolate, 1-2^ lin. long, 

 more or less toothed ; flowers rather 

 few in the axils of the upper distant 

 pairs of leaves ; corolla-tube 10- 



11 lin. long 16. 8. Forbesii. 



Plant glabrous, with scale-like leaves li- 



2\ lin. long 24. S. Baumannil. 



XX Calyx 15-17-ribbed. 



Calyx rigid, very prominently and regularly 

 ribbed ; corolla "white. 

 Corolla-tube 10 lin. long; limb 8-15 lin. 



in diam. ..... 19. S. puliflora. 



Corolla-tube 6 lin. long; limb 5-6 lin. in 



diam. ...... 20. S. euphrasioides. 



Calyx scarcely rigid, less prominently and 

 regularly ribbed; corolla orange or 

 brick-red. 

 Corolla-tube 10-15 lin. long ; limb 7- 



10 lin. in diam. .... 17. S. latericea. 



Corolla-tube 8-9 lin. long; limb 11- 



12 lin. in diam. . 18. S. somaliensis. 

 ff Spikes densely flowered (sometimes loosely flowered 



ill S. elegans), rather short and thick. 

 Spikes cylindric ; bracts lanceolate. 



Leaves about 1 lin. broad; corolla-limb 6- 



9 lin. in diam. ..... 14. S. elegans. 



Leaves 2-3J lin. broad ; corolla-limb about 



3 lin. in diam. . . . . . 21. S. Klingii. 



Spikes quadrangular ; bracts broadly ovate to 



obovate ....... 22. S. macrantha. 



VOL. IV. SEC. 2 2D 



