84 



ONOSMA SETOSUM. 



from Russian seeds in the spring of 1838. As only one plant vegetated at that 

 time, it was taken up, divided in the autumn, and protected in a cold frame 

 during the winter ; but there is no doubt of its being perfectly hardy. 



Its duration is stated by Ledebour to be perennial, but it probably may be 

 only biennial. It may be increased by seeds, which is the best way of obtaining 

 good plants of all the Onosmas ; though it might- also he increased by cuttings. 

 It will thrive in any common soil, and will flower in June and July. 



The generic name is derived from ovos, an ass, and 00-^7), smell, from the 

 supposition that these plants are grateful to that animal. The specific name 

 setosum alludes to its bristly appearance. 



Fig. 1, calyx ; 2, corolla, laid open to show the stamens ; 3, pistil ; 4, 

 ovarium, deeply divided into four lobes. 



