404 . Key to the System of 



obliquely dilated towards the base, all of nearly equal 

 length ; lower petal considerably shorter, white with 

 purple spots, its middle lobe rather broader than long ; 

 gynostemium short ; fruit turgid. D. speciosum. 



Leaves narrow-cylindrical. 



Generally a rock -plant, always dwarf, amply rooting, thin- 

 branched ; leaves pointed, somewhat curved ; flowers 

 solitary, on elongated stalks, turning upside down, 

 whitish-yellow, reddish-streaked ; bract minute ; calyx- 

 lobes about as long as the petals, almost lanceolar, but 

 the lower towards the base obliquely dilated ; lower petal 

 quite as long as the others, whitish, its middle lobe' 

 nearly semielliptical in outline, crisped ; gynostemium 

 truncate - ellipsoid, very short ; fruit rather turgid. 

 Figure 112. D. striolatum. 



SARCOCHXIiTJS. 



1756. Calyx-lobes and lateral petals greenish, the lower 



calyx-lobes distant from the upper. 



Epiphytal, chiefly on branches of the musk-tree ; stem very 

 short or obliterated ; leaves few or several, narrow- 

 lanceolar, rather curved ; flowers from few to many in 

 axillary raceme-like spikes, fragrant ; bracts quite small ; 

 calyx-lobes and lateral petals almost lanceolar; lower 

 petal whitish ; its lateral lobes very conspicuous, oblique- 

 elliptical, red-spotted ; its middle lobe' minute, but 

 terminating a thick often dilated and blunt basal pro- 

 trusion ; gynostemium very short ; fruit many times 

 longer than broad. S. parviflorus. 



CALEYA. 



1757. Labellum fixed above its lower end to the stalk-like 



base. 



Hather tall ; leaf broad-linear, basal ; stem with one empty 

 bract near the middle ; flowers large, one to three, with 

 an additional rudimentary one, dark-purplish except the 

 calyx-tube ; stalklets short ; paired calyx-lobes inserted 

 close to the third lobe ; labial petal (labellum) roundish - 

 ovate, pointed, concave beneath ; gynostemium very 

 large ; fruit slender. C. major. 



Labellum gradually narrowed into the stalk-like base. 



Rather dwarf; leaf narrow-linear; stem without any empty 

 bract ; flowers small ; paired calyx-lobes inserted at some 

 distance from the third lobe and from the paired petals ; 

 labial petal laiiceolar-ovate, close to the paired calyx- 

 lobes ; fruit slender. C. Sullivani. 



