IMPA TJENS. 
43 
The inflorescence of /. grandis is sometimes reduced to a single- 
flowered peduncle with a median bract indicating the insertion of the 
pedicel. 
* Shrubs or large branching herbs ; leaves alternate, or opposite 
and alternate in I. vcrticill ata. 
Sepals orbicular ovate or oblong J | in. long, leaves 
alternate. 
Spur longer than the limb of the 
lip. 
Flowers very large, sepals 
oblong acute, lip with spur 
tubiform . . . , 43. /. grandiSy Heyne. 
Flowers medium-sized, sepals 
orbicular cuspidate, bracts 
slender . . . • 44. /. fruticosay DC. 
Flowers medium-sized, sepals 
ovate acuminate, bracts 
ovate .... 45. /. visciday Wt. 
Spur shorter than the limb of 
the lip or o. 
Sepals ovate aristately accumi- 
nate, spur of lip in. long 
or o . . . . 46. /. campanulata, 
Wt. 
Sepals oblong acute, spur of 
lip in. long . • 47* disotisy Hk. f. 
Sepals linear, leaves opposite and 
whorled spur long slender . 48. I. verticillatay Wt. 
Annual herbs. 
Leaves all opposite. — Species all want careful revision. 
Dorsal auricle of wings filiform enclosed in the spur of the 
lip except in var. of /. emissa, peduncle many-fld. 
Leaves ovate petioled, 1-2 in. long. 
Spur of lip shorter or longer 
than the wings, not inflated 49. /. G ghii, Wt. 
Spur of lip longer than the wings, 
inflated . . . . 50. /. viscosay Bedd, 
Leaves oblong or elliptic susses- 
sile i-i in. long . -Si* omtssay Hk. L 
