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and greyish on the under surface; the stems terminated 

 by Jong, narrow racemes of vivid yellow flowers, suc- 

 ceeded by large, swollen capsular fruits. May-October 

 over all sunny slopes of our mountain regions. 



Ti. grandiflorum is distinguished by very large flowers 

 and leaves green on both surfaces; Ji. alpestre (PI. XV) 

 by leaves green below and covered with hairs on the mid- 

 rid and petiole. 



Ji. canum * is a well marked species, with narrow, ovate 

 leaves, hoary and covered with hairs, especially on the 

 under side ; flowers small, yellow, united in short ra- 

 cemes. June-August. Rocky slopes of the Jura and the 

 Saleve (beyond the frontier). 



7i. Tumana. Dwarf and slender shrub, with branches 

 either erect or procumbent ; leaves alternate and sharpened 

 like short needles; flowers yellow, only opening in the sun 

 and whose petals fall at the least shock. June-September. 

 Dry slopes of south and west Switzerland. 



