THE GENUS MANETTIA 15 



BB. Leaves never conspicuously thick, folded, nor revo- 

 lute ; herbaceous or fleshy. 

 Leaves mostly 2-3 cm. long, flat, membranous ; veins 



scarcely appearing on the lower side ; corolla 5 mm. 28. parvula. 

 Leaves mostly 4-6 cm. long at least, generally con- 

 siderably larger. (Except M. Lindenii.) 

 C. Inflorescence of many stalked flowers in axillary 

 fascicles, with no apparent primary peduncle 

 nor main rachis. 



Leaves velvety- tomentose beneath 55. verticillata. 



Leaves iisually glabrate, -never velvety, beneath. 

 Rete apparent between the main leaf-veins; young 



parts not pulverulent nor arachnoid 53. congesta. 



Eete occluded ; youngest parts pulverulent- 

 arachnoid 54. congestoides. 



CC. Liflorescence 1 -oo -flowered, with manifest pedi- 

 cel, primary peduncle, or main rachis, cymose or 

 decussate-paniculate. 

 D. Corolla-tube barely 3 mm. long. 



Inflorescence very lax, ample, divaricate, many- 

 flowered 41. panicidata. 



Inflorescence abbreviated, of several flowers 

 more or less densely compacted ; capsule only 



2 mm. in diam 40. mirrocarpa. 



Inflorescence few-flowered, or not densely com- 

 pacted, nor noticeably abbreviated. 



Corolla- tube longer than the lobes 27. lygistoides. 



Corolla- tube shorter than the lobes. 

 Youngest stem-parts quite glabrous (Costa- 



E/ica) 39. barbata. 



Young stem-parts more or less densely pilose 



(Guiana) 37. alba. 



DD. Corolla-tube upwards of 1*5 cm. long. 



Plant conspicuously hairy and hispidulous. (§ Ysginanthus.) 

 Capsule globose; inflorescence many-flowered. 62. Pearcei. 

 Capsule ovoid, with acute-acuminate apex ; in- 

 florescence few-flowered. 



Corolla-lobes rotund -truncate at apex 63. Jdspida. 



Corolla-lobes lanceolate acute-acuminate ... 64. miniata. 

 Plant glabrous, or nearly so. 

 Stipular sheath bearing a long setose arista on 



each side ; calyx-lobes 4, free to base 42. Sonderiana. 



Stipules not aristate ; calyx tubular at base, 

 usually with 8 lobes. (§ Ysginanthus.) 



Stipule simple, truncate or acute 72. coccinea. 



Stipule manifestly 2-3-toothed ; plant usually 



puberulous 68. j^leiodon. 



DDD. Corolla-tube 5-14 mm. long. 



Corolla-lobes orbicular, 8 mm. broad ; calyx tubular 



at base 74. orbifera. 



Corolla-lobes more or less narrow, oblong, 3 mm. 

 broad at most. 



E. Corolla-lobes hairy on back and margins, espe- 

 cially about apex. 

 Stem densely sericeo-viUous, with backward- 

 pointing hairs 61 . Glaziovii. 



Stem-hairs spreading when present, never de- 

 flexed. 

 G. Calyx-lobes broadly ovate to oblong. 



Ovary densely yellow sliaggy-villous, the 

 flowers borne indiscrimiiiutely among the 



