THE AMERICAN BOTANIST 19 



three stem-leaves, mostly in a whorl. The form has six 

 leaves, the first three being generally alternate with the 

 three smaller leaves above mostly whorled through some- 

 times alternate. The irregularly and much toothed leaflets 

 and upright habit differ very strikingly froVn our common 

 form with its more spreading leaves and remotely toothed 

 leaves and segments. Between the two extremes, how- 

 ever, there are many shades of variation and the only con- 

 stant character that separates this particular form from the 

 rest are the extra leaves. The flowers are smaller than in 

 the usual form with petals only twice as long as the sepals. 

 They are generally three times as long, but in this respect 

 there is much variation. 



When some years ago, as a beginner in the study of the 

 local flora I discovered this leaf variation my first thought 

 was that I had discovered a new species. However, it 

 seems that in a species that includes such a range of forms 

 as does Dcntana laciniata, the characters mentioned can 

 hardly be considered specific, but as no mention is made in 

 the Manuals of a six-leaved Dent aria, the fact that such a 

 form occurs should be of sufficient interest to be recorded, 

 and as the editor of the Botanist has suggested that all such 

 plant forms should be named in order to facilitate future 

 mention of the same, I would therefore characterize this as 



DENTARIA LACINIATA F. HEXIFOLIA. 



This differs from the type in having six leaves, the lower 

 three mostly alternate and the smaller upper leaves often 

 whorled; leaflets much toothed. Flowers small, about 

 1 cm. long or less. Frequent in the woods around High 

 Lake, Iowa. 



