14 THE GENUS MANETTIA 



Calyx-lobes not foliaceous, usually oblong. 



Leaves incano-tomentellose, especially below 9. sithlanata 



Leaves glabrous or pubescent, not white-haired. 

 Stem with 4 raised translucent angles bearing' 



minute recurved prickles 6. boliviana. 



Stem with no definite raised angles. 

 Calyx-lobes rotund-ovate, with very blunt apex ... 7. chrysoderma. 



Calyx-lobes oblong or lanceolate, acute 5. coniifolia. 



Corolla pubescent externally. 



Calyx-lobes linear, subsetose, more or less elongate 11. pithescens. 



Calyx -lobes flat, lanceolate to ovate ; leaves saliciform . 12. angustifolia, 



A A . Flowers of medium size, the corolla more or less cylin- 

 drical with stout tube upwards of 2 cm. long, usually 

 swollen at some point of its length or at the base, 

 densely tomentellose externally § Heterochlora. 



Calyx-lobes linear, more or less rigid and straight, elon- 

 gated ; corolla cylindric. 

 Calyx-lobes 5-nerved, pubescent on both sides, with 



subulate additional teeth 13. quinquenervia. 



Calyx-lobes 1 -nerved, glabrous within at least, with no 



interposed teeth 14. pedunculata. 



Calyx-lobes ovate or oblong, often foliaceous, not elongate 

 nor rigid. Corolla-tube usually swollen above or below. 

 Flowers solitary or in pairs in the axils, sometimes more, 

 but never numerous. 



Calyx-lobes 8 15. Smithii. 



Calyx-lobes 4. 

 Corolla cylindi-ic, with no manifest swelling ; calyx- 

 lobes not foliaceous ; corolla-hairs short, broad, simple. 16. luteo-ruhra. 

 Corolla-tube swollen above or below ; calyx-lobes 

 large, foliaceous, reflexed; corolla-hairs jointed 

 mostly. 



Tube much swollen at base, cylindric above 17. injlata. 



Tube swollen above the middle, narrowed toward 



apex. Calyx-segments very large and leafy 18. Uojasiana, 



Flowers several together in axillary umbels. 



Calyx-lobes flat, broadly ovate 19. calycosa. 



Calyx-lobes lanceolate with strongly revolute margins... 20. Holtoidi. 



AAA. Flowers small, rarely exceeding 1*5 cm. in length, 

 generally much less. Corolla usually hypocrateri- 

 form, in a few cases narrowly infundibular, -(vith 

 lobes more or less erect :. . . . § Ltgistum & Ysginanthus. 



Inflorescence a compact pedunculate head. 



Leaves broadly cordate-ovate, with relatively long 

 stalks -. 76. capitata. 



Leaves ovate-lanceolate, stalks very short 77. Miersiana. 



Inflorescence not capitate. 



B. Leaves small — 3-4 cm. long at most — very tough 

 with strongly revolute margins, deeply wrinkled 

 and folded in relation to the main veins. 

 Corolla-tube 1 cm. or longer ; leaf- veins projecting 



beneath as very strong ribs 21 . scaberrima. 



Corolla-tube 5-6 mm. long at most. 

 Leaves acute at base. 



Leaves glabrous 22. recnrva. 



Leaves scabridulous above, densely tomentose 



beneath 23. canescens. 



Leaves broadly truncate, often cordate, at base, 

 densely tomentose beneath 24. pichinc'hensis. 



