PLATE 2 



Fig. 3. Showing the extremes of variation in size and pigmentation of 

 leaves and flower parts. Plants of the yellow-green color form of T. sessile 

 var. giganieum from Camp Taylor, Marin County. 



Fig. 4. Showing variation in size and shape of flower parts in T. sessile 

 var. giganieum. From herbarium specimens, plants of the Berkeley Hills. 



[20] 



