POLEMONIACE^.- JACOB'S LADDER TRIBE. 



VILLARSIA NYMPHCEof DBS ( Water Villarsia). 



ORD. LVLPOLEMOOTACE^. JACOB'S LADDER 

 TRIBE. 



Calyx deeply 5-clef t, not falling off ; corolla regular, 

 5-lobed ; stamens 5, from the middle of the tube of the 

 corolla ; ovary 3-celled ; style single ; stigma 3-cleft ; 

 capsule 3-celled, 3-valved. Herbaceous plants, often 

 with showy flowers, which are remarkable for the blue 

 colour of their pollen. They are most common in the 

 temperate parts of America ; but within the tropics are 



