I-'J1 CBUCIFERAE (MTSTAKD FAMILY) 



1. L. uniflbra (Michx.) Britton. Scapes 5-15 cm. high ; leaf-lobes usually 

 numerous (7-15); petals purplish or nearly white with a yellowish base, obtuse ; 

 pods not torulose, oblong to linear (1.2-3 cm. long); style short. (L. Michantii 

 Torr.) Barrens, s. Ind. to Tenn. and Mo. 



2. L. torulbsa Gray. Similar, but pods torulose even when young, linear ; 

 style 2-4 mm. long ; seeds acutely margined rather than winged ; petals eraargi- 

 nate. Barrens of Ky. and Tenn. 



29. DENT ARIA [Tourn.] L. TOOTHWORT. PEPPER-ROOT 



Pod lanceolate, flat. Style elongated. Seeds in one row, wingless, the funic- 

 ulus broad and flat. Cotyledons petioled, thick, very unequal, their margins 

 somewhat infolding each other. Perennials, of damp woodlands, with long 

 fleshy sometimes interrupted scaly or toothed rootstocks, of a pleasant pungent 

 taste ; steins leafless below, bearing 2 or 3 petioled compound leaves about or 

 above the middle, and terminated by a corymb or short raceme of large white 

 or purple flowers. (Name from dens, a tooth.) 



Stem glabrous. 



Kootstock continuous, prominently toothed 1. D. diphylla. 



Rootstock interrupted by distinct constrictions. 



Rootstock elongate, composed of several fusiform or subcylindric dis- 

 tinctly toothed segments. 

 Cauline leaves with ovate or obovate petiolulate leaflets . . . . 2. D. maxima. 



Cauline leaves with lanceolate sessile leaflets 3. D. incisifolia. 



Rootstock of readily separable obscurely toothed fusiform tubers . . 4. D. h eteroji/i yU,i. 

 Stem pubescent, at least above. 

 Rootstock of readily separable fusiform tubers ; sepals 6-9 mm. long. 



Leaves 3-parted, with linear to oblong segments 5. D. laeiniatn. 



Basal leaves with ovate or rhombic leaflets 4. D. heteropli i/ll . 



Rootstock elongate, interrupted by constrictions ; sepals 3-4 mm. long . 6. D. anoiiuita. 



1. D. diphylla Michx. Rootstock long and continuous, often branched, the 

 annual segments slightly or not at all tapering at the ends; stems in anthcsis 

 1.5-3 dm. high, stoutish ; leaves 3-foliolate, the basal 

 and cauline similar, the latter 2 (rarely 3), opposite or 

 subopposite, leaflets 4-10 cm. long, short-petiolulatc, 

 rhombic-ovate or oblong-ovate, coarsely cr<'ix/ti\ tl- 

 teeth bluntly mucronate; flowers white; sepals 5-8 mm. 

 long, half the length of the petals; pods rarely maturing. 

 Rich woods and thickets, e. Que. to s. Ont. and Minn., 

 s. to S.C. and Ky. Apr., May. Rootstocks 2-3 dm. 

 long, crisp, tasting like Water Cress. FIG. 767. 



2. D. maxima Nutt. Kootstock interrupted, consist- 

 ing of several elongate strongly toothed segments wh'u'h 

 are constricted at each end, the older commonly retaining 

 shreds of old stems ; cauline leaves 2-3, alternate, ofti-n 

 remote, leaflets 2-6 cm. long, ovate or obovate, petiolnl<it>, 

 767 D diphylla more or less ciliolate, sharply and coarsely t'mt/tcii <nnl 



Cauline leaves and root- somewhat cleft; flowers white or purple-tinged; sepals 

 stock xvT ?~ 7 mm - lon S' half a 8 lon S * l . he Petals. By streams 



in rich woods, local, s. Me. to Mich, and Pa. Apr., May. 



3. D. incisifblia Eames. Rootstock much as in the last; cauline Ifm-ix 2 

 and opposite, rarely 3 and alternate, the leaflets 4-0 cm. long, lanceolate, st-ssil>', 

 glabrous tlimn<jhout, coarsely tncised-dentate ; basal leaves similar, with 

 bn>;ulrr leaflets; flowers white or somewhat purple-tinged; sepals 6-7 mm. 

 loiig; petals 1.6-2 cm. long. Rich hillside woods, Sherman, Ct. (Eames). 

 May. 



4. D. heterophylla Nutt. Tubers near the surface ; stems, in anthesis. 1.-V4 

 dm. high, glabrous or sparingly pubescent above ; ^inline leaves 2-3. variously 



, the leaflets 1.5-5.5 cm. long, distinctly petiolulate, oblonff-lanceolate to 

 ; ciliate, entire to deeply crenate, rarely laciniate ; basal leaves with ovate 

 to rhonibic-obovatc usually lobed leaflets; flowers purplish ; sepals purple-tinged, 



