PLANT DESCRIPTION. 133 



Description of Fig. 246. 



ROOTS tuberous. 



STEM smooth, low, weak, slender, herbaceous, 

 round. 



LEAVES cauline, opposite, a single pair, sessile, 

 exstipulate* feather-veined, entire, lanceolate. 



INFLORESCENCE a loose definite raceme. 



FLOWER. CALYX ; sepals 2, polysepalous, regu- 

 lar : COROLLA ; petals 5, polypetalous (or slightly 

 coherent at the short claws), spreading ; stamens 5 ; 

 jttaments threadlike ; anthers oval : PISTIL ; carpels 

 3 ; style slender, three-cleft ; stigma along the inner 

 side of the three-cleft style. 



