500 



Cruciferae 



Dentaria 



50 



Map 1029 



Dentaria diphylla Michx. 



50 



Map 1031 



Leavenworthia uniflora (Michx.) Britt. 



2967. DENTARIA [Tourn.] L. Toothwort 



Inflorescence pubescent; rootstock deeply rooted, an elongated tuber usually 1.5-3 cm 

 long, increased annually by additional ones, forming a lineal series; basal and 

 cauline leaves similar but the basal ones absent at flowering time; cauline leaves 

 3, whorled or approximate, rarely alternate, cleft nearly to or to the base into 3 

 nearly equal, broadly lanceolate to linear parts, the parts sometimes likewise 

 cleft, their margins serrate, more or less incised, or entire; anthers mostly 1.5-2.3 



mm long 1. D. ladniata. 



Inflorescence glabrous. 



Basal and cauline leaves similar in shape. 



Rootstocks elongated tubers, deep in the soil; basal leaves biternate, all of the 

 segments linear with smooth margins; cauline leaves 2, opposite, biternate 

 with linear segments, margins of segments smooth, sometimes the ultimate 

 segments cleft or divided; petals white, tinged with purple, anthers 1.5-2 



mm long 2D. multifida. 



Rootstocks continuous, usually 5-15 cm long, not deep in the soil; basal leaves 

 ternate, on petioles generally 7-15 cm long; leaflets rhombic-ovate, or oblong- 

 ovate, petiolate; cauline leaves 2, rarely 3, opposite or nearly so, on petioles 

 generally 0.5-4 cm long, ternate or deeply cleft into 3 parts; margins of all 

 leaflets generally ciliate and coarsely crenate with bluntly mucronate teeth; 



anthers about 3 mm long 3. D. diphylla. 



Basal and cauline leaves not similar in shape; basal leaves much larger than the 

 cauline ones, ternate, on petioles generally 5-15 cm long; leaflets similar to the 

 preceding; cauline leaves 2 or 3, variously disposed, on petioles 0.5-3 cm long, 

 ternate, deeply cleft into 2 or 3 parts, or simple, the margins of the parts gen- 

 erally ciliate and serrate, sparingly toothed or entire; rootstock consisting of 

 elongated tubers near the surface of the ground; anthers generally 1.5-2.3 mm 

 long 4. D. heterophylla. 



1. Dentaria laciniata Muhl. Cut Toothwort. Map 1027. Infrequent 

 to frequent in rich woods throughout the state. This species prefers moist 

 soil and deep leaf mold. The variability of the plants has led authors to 

 assign specific, varietal, and hybrid names to these variations. I can do 

 no better than to quote J. M. Coulter (Ann. Rept. Geol. Surv. Indiana 6: 

 234. 1875) who recognized these variations and said in his flora of Jeffer- 

 son County : "The leaves vary from almost entire to finely dissected. Some- 



