.100 SWARZ ON THE GENERA OF ORCHIDE^, 



c and the calyx of Orchis Burmannia has a real 

 tube. In this latter, it might as well be called 

 quinquepartite ; but this case is very rare, the calyx 

 being generally pentaphyllous. Both in flowers 

 that entirely expand, and in those that connive, 

 and are as it were ringent or vaulted, that 

 leaflet of the calyx which is situated behind the 

 back of the style, and is generally broader, forms, 

 either alone or unitedly with the two inner lateral 

 ones, a helmet or fornix, beneath which the parts 

 of fructification are situated. Thefe leaflets are 

 generally coloured, particularly the inner ones ; 

 "whence, by some (though without reafon), a pen- 

 tapetalous corolla has been attributed to the 

 Orchidea?. Other botanists (as We del), ob- 

 serving the outer leaflets to be commonly larger, 

 thicker, less coloured, remaining longer after fruc- 

 tification, and surrounding the two inner ones ; and 

 these, on the other hand, together with the third 

 (generally called lip or nectary) appearing later, 

 thinner, and, in certain genera, rather unlike the 

 former, more shining and differently coloured,-— 

 attributed to the plants of this order, a three leaved 



