Victorian Plants. 411 



1781. Flowers comparatively small. 



Dwarf ; basal leaves narrow-linear, usually more than two ; 

 flowers few or reduced to two or one ; petals yellowish, 

 marked with several dark spots ; lower calyx-lobes some- 

 what longer than the labellum, greenish or rather 

 brownish ; the latter with two narrow longitudinal 

 elevations towards the base, its middle lobe very blunt, 

 slightly exceeding the lateral lobes ; fruit rather slender. 



D. palustris. 



Flowers comparatively large ... ... ... ... 1782 



1782. Middle lobe of the labellum less than twice as long 



as the lateral lobes, obtuse ... ... ..." ... 1783 



Middle lobe of the labellum more than twice as long 

 as the lateral lobes, acute ... ... ... ... 1784 



1783. Upper calyx-lobe and petals confluently yellowish 



and brownish. 



Root-fibres tuberously thickened ; basal leaves usually two 

 or three, broad - linear, somewhat channelled ; upper 

 leaves one or two, almost bract-like ; flowers few, 

 occasionally reduced to two or even one; bracts con- 

 spicuous ; lower calyx-lobes hardly twice as long as the- 

 labellum ; paired petals narrowed into a short stalk-like 

 base, with the upper calyx-lobe and labellum rarely 

 turning plain-yellowish ; labellum without prominent 

 longitudinal narrow elevations towards the base, its 

 middle lobe dilated upwards ; fruit rather slender. 



D. longifolia. 



Upper calyx-lobe and petals yellow, all dark-spotted. 



Tubers thick ; basal leaves usually two, broad-linear, 

 channelled ; flowers few or several ; lower calyx -lobes 

 about twice as long as the labellum, greenish or partly 

 brownish, somewhat turning across each other ; paired 

 petals narrowed into a stalk-like base; labellum with 

 two longitudinal narrow elevations towards the base ; 

 its middle lobe hardly longer than broad, of scarcely 

 double the length of the lateral lobes or even shorter; 

 fruit slender. D. maculata. 



1784. Upper calyx-lobe and petals in part dark-blotched. 



Tubers rather slender; basal leaves usually two, broad- 

 linear, channelled ; upper leaves generally bract-like ; 

 flowers six or fewer, occasionally only two ; bracts con- 

 spicuous ; lower calyx-lobes about twice as long as the . 



