75 



ruderale of C. F., and distinct from the true Western 

 L*^ apetalmn * 



The ahoye discussion relates to the specimens de- 

 termined not to be L« Tirgrinicom. There seem to be only- 

 two rery evident and strictly safe diagnostic characters 

 available for the decision between L. virginicum and the 

 closely related species, the position of the cotyledons 

 and the presence of petals - and L» apetalum may have 

 minute petals » while L. medium ^reported from near New ' 

 York city, B. & B., not B. M.) has petals. All specimens 

 with a ^sumJaient cotyledons have been classed as L. virgin - 

 icum ), while the rest are either out of bloom or perhaps 

 too far advanced in flowering. No plant with petals has 

 been found to have seeds with jBtcoMttent cotyledons - 

 and this applies also to specimens with petals collected 

 elsewhere . 

 Variation: 



There are considerable individual differences in 

 leaf -form, and probably several types differing in the 

 amount of division of the leaves, etc., could readily be 

 isolated. 



oL'tljU^^ Jkv^^ ^.jitJU fyJf^'- L, C AXX. JL. A^^^^^vvA<.^.v^ J 



