Leavenworthia Cruciferae 501 



times there are three leaves in a whorl ; sometimes these leaves are alter- 

 nate ; sometimes there are four alternate leaves ; often there are but two 

 leaves either opposite or alternate. In fact there is no kind of division or 

 position of leaves which is not represented in this species." The preceding 

 observation applies to my specimens but I doubt that hybridization is 

 responsible for such variations as the alternate character of the leaves, 

 since, in our area, there are no alternate-leaved species nor entire-leaved 

 species in the genus as now known, with which D. laciniata could hybridize. 

 I believe it is best to regard the genus as a mutating one and some of the 

 aberrant specimens as examples of reversion to ancestral forms. 

 Western Que. and Vt. to Minn., southw. to Fla. and La. 



2. Dentaria multifida Muhl. Map 1028. This species was first recog- 

 nized as such by Miss Edna Banta, who found it in 1935 on a rocky, wooded 

 slope along Big Creek a mile west of Volga, Jefferson County. It was 

 found also in Jefferson and Clark Counties by early authors who confused 

 it with other species of the genus. They remarked about the many forms 

 of leaves of their specimens. Schneck, in his list of plants from the Lower 

 Wabash Valley, also calls attention to the varied leaves. 



Ind. and Ohio, southw. to Ga. and Ala. 



3. Dentaria diphylla Michx. Crinkleroot. Map 1029. This species 

 has a very restricted range and is local in the state. Where it is found, it 

 often forms large colonies. My Steuben County plant was found in 

 the A. E. Emerson woods about 6 miles southwest of Angola. This colony 

 was very dense, about 3x6 feet, and located in very moist and sandy soil 

 on a low, alluvial flat along a small creek. The Ohio County plants were 

 also found in large colonies on the moist slope of Laughery Creek. 



Eastern Que. to s. Ont. and Minn., southw. to S. C. and Ky. 



4. Dentaria heterophylla Nutt. Slender Toothwort. Map 1030. In- 

 frequent to frequent but locally common on moist, rich, wooded slopes in 

 the southern part of the state. There is a report from Cass & Wabash 

 Counties but there is no specimen. The stem leaves of this species are 

 very variable. 



N. J., Pa., and Ind., southw. to Ga. and Tenn. 



2971. LEAVENWORTHIA Ton. 



1. Leavenworthia uniflora (Michx.) Britt. Michaux Leavenworthia. 

 Map 1031. This species is known from only one county in the state. It was 

 discovered by Chas. R. Barnes in 1877 at a place locally known as Denny's 

 Lick, about a mile southeast of Charlestown, Clark County. I collected it 

 there in mature fruit, May 1, 1918, and late in May, 1933, some members 

 of the Indiana Academy of Science visited the place and found it abundant 

 over several acres but it was almost past the fruiting stage. The early 

 fruiting dates indicate that it must flower early in April. The habitat is 

 the washed limestone slopes of a permanent pasture where it is associated 

 with Draba verna, Oxalis violacea, and Veronica arvensis. 



Ind. to Ky., Tenn., and Ark. 



