— 18 — 



b'. Primary tubers large; rhizomes large and thick, mostly ventricose ! 

 terminal buds very blunt (lateral inflorescence), 

 a^. Tubers internally yellow. 



a^. Primary tubers 100X100. rhizomes an inch thick, with few 

 branches, colour internally orange-yellow to miniate ; pendulous 

 tubers orange coloured on the section. C. xanthorrhiza. 



b^. Rhizomes thick in the middle, sometimes long, mostly short, with 

 rectangularly spreading, more or less barrelshaped and clavate 

 side-branches, in the middle thick with narrower base and top; 

 tertiary branches tuberous. Section when young, very pale-yellow 

 (231) when old light melleous-brown. Pendulous tubers very 

 large, internally pale sulfureous. C. Zedoaria. 



b^. Tubers internally blue,rhizomesandsecondarybranchessometimes 

 long, ventricose, slightly upcurved or S-shaped, with rounded 

 top, branches not numerous, pendulous tubers numerous at the 

 rhizomes, internally pearl-grey, 

 a^. Rhizomes internally light-blue or light-green (396 and 0296); 



stems green. C. aeruginosa. 



b^. Rhizomes internally often sallow-yellow or green, at the top and 

 the buds more or less blue ; stems darkbrown ;] C. phaeocaulis. 



II. Roots. 



The roots which spring in a very large quantity from the bulb and 

 more isolated also from the rootstocks are filiform and very long. In young 

 bulbs they often are thickened more or less near their base, even so as to 

 appear almost napiform but tapering gradually and passing into ordinary 

 fibre roots; roots of a diameter of 5 mm. were observed e. g. in a young 

 bulb of C. Heyneana where they formed a dense group in the centre of the 

 tuber amidst a large quantity of thinner fibre roots. Upon a tuber of 

 C. xanthorhiza they reached a diameter of a little finger. 



RuMPH describes similar roots as belonging to one species in particular, 

 called by him with the malayan or Javan term "tis" or "dingin" and he 

 compares them with the clavate pendulous tubers of the "Kuntchi" Gastrochilus 

 panduratum. 



During the flowering period part of the fibrous roots form at their end 

 filipendulous or pendulous tubers. These may be ovate or pearshaped, 

 spindle-shaped or ellipsoidal and sometimes they pass again into fibrous 

 roots at their end. Their lenghth may vary between 20 mm. and 150 mm. 

 and their distance from the bulb from 10 mm. to 400 mm. 



They are internally of a spongious or succulent or often viscous tissue 

 and mostly of a watery-pale pearl-colour. But often they are quite yellow 

 or orangecoloured internally and in other species pearl-grey with a citrine 



