376 xcn. scrophulawace/E (hemsley and skax). [Buchnera. 



Spikes densely and 



softly hairy . . 24. B. reissiana. 



Spikes more sparingly 

 and rather hispidly 

 hairy. 1 

 Corolla-limb only 



]|- lin. in d 



mm. 



25. 



B. 



Randii. 



26. 



B. 



Poggei. 



27. 



B 



albiflora. 



28. 



B. 



Verdiekii. 



Corolla-limb about 



4 lin. in diain. . 



XX Bracts close together in the upper part of the 



spike, a few at the base more or less distant. 



Plant 1 J ft. high 



Plant only \\- 2 J in. high 

 ft Spikes or heads compound, at least at the base. 



Flowers in vei'y dense heads ; plants f— 1^ ft. 

 high or more, hispidly hairy. 

 Stem sparingly leafy ; flower-heads axillary . 29. B. Nuttii. 

 Stem very leafy ; flower-he.tds terminal. 



Calyx 5-toothed, shortly hairy on the ribs . 30. B. andongensis. 

 Calyx 4-toothed, long-hairy on the ribs . 31. B.foliosa. 

 Flowers in a rather loose head ; plant about 



6 in. high, almost quite glabrous . . 32. B. nitida. 



** Flowers in long often lax and slender spikes, which 

 d usually elongate very much in fruit ; stems 

 erect. 

 Calyx-teeth 4. 



Corolla-tube slightly inflated above the calyx . 35. B. inflata. 

 Corolla-tube cylindric (not inflated above the 

 calyx). 

 Leaves linear-lanceolate ; spikes l-3r-2 in. long 33. B. nigricans. 

 Leaves narrowly linear; spikes 5 in. long . 34. B. benthamiana. 

 Calyx-teeth 5. 



Spikes continuous even in fruit or only slightly 

 interrupted at the base. 

 Corolla-tube much longer than the calyx ; 



lobes 75-| lin. broad, thick . . . 36. B. tuberose. 



Corolla-tube as long as or only slightly longer 

 than the calyx ; lobes £— 1-J lin. broad, 

 thin. 

 Bracts 8 lin. long, about 2 lin. longer than 



the calyx ...... 37. B. usuiensis. 



Bracts 4-5| lin. long, shorter to J lin. 



longer than the calyx . . . 38. B. similis. 



Spikes, especially in fruit, very much interrupted, 

 f Spikes glabrous or nearly so. 



Stem leaves very narrowly linear. 



Spike few-flowered ; corolla scarlet or 



orange-red; lobes 3-|— 5 lin. long 40. B.fulgens. 

 Spike many-flowered; corolla bluish; 



lobes If- 2-J- lin. long . . 41. B. Baumii. 



Stem leaves usually lanceolate, sometimes 

 linear-lanceolate or oblong. 

 Corolla-tube 1^-4^ lin. long ; lobes 

 \- \\ lin. long, ^-1 lin. broad. 

 Plant 9-12 in. high ; bracteoles 



absent ; calyx I5— 2 lin. long . 42. B. liumpaien&is. 









