Notes. 
716 
hairs (with three, four, or more arms) quite similar to those on the cotyledons of the 
wallflower occur on the leaves of the mature plant in several species of Erysimum , 
a genus very closely related to Cheiranthus} 
I hope to publish later some observations on the hairs of the seedlings and 
mature plants of certain species of Erysimum . Further considerations of the results 
obtained in the wallflower are therefore better postponed. 
L. A. BOODLE. 
Jodrell Laboratory, Kew. 
1 According to Wettstein’s observations (Die Gattungen Erysimum u. Cheiranthus , Oesterreich. 
Bot. Zeitschrift, 1889, p. 243) the separation of the two genera cannot be upheld. 
