CUUCirKK.Ii. (MLoTAKi) FAMILY.) 65 



§ 3. Petals white, mtirh loiKjor than the calj/.c : fiods oroid or (jlohuUtr : Itiivcs undicidid, 

 or the lourr ones piiiiKili/id : root iitriunud. ( Aniioriifia.) 



7. N. lactlStre, Gray, Gen. 111. 1, p. i;J2. (Lakk C"iu;ss.) Aquatic; 

 imiiKTsod kavcs 1 -3-pinnatt'ly ilissei'tud into nnniiTous ciijiilliiry divisions; 

 cnuTscd leaves olilonj^, entire, serrate, or pinnatilid ; pedicels widely spreadin;,'; 

 pods ovoid, oue-i-t/led, a link' loin/i-r than the stijle. (N. natans, var. Aincricannni, 

 Gniy. Arnioraeia Americana, Ant.) — Lakes and rivers, N. IC. New York to 

 Illinois and sonthwestward. July- Aug. — Near N. anipliibiuni. 



8. N. AuMonXciA, Fries. (Hokskkadisii.) Koot-leaves very large, ob- 

 long, erenate, rarely pinnatifid ; those of the stem lanceolate ; fruiting pedicels 

 ascending; jiods </'obiilur {scklom formed); sti/le very "short. (Cochlearia Arnio- 

 raeia, L.) — Roots large and long ; — a well-known condiment. Escaped from 

 cidtivation into moist ground. (Adv. from Eu.) 



2. LEAVENWORTHIA, Torr. Leavkxwortiiia, 



Pod broadly linear or oblong, flat; the valves nerveless, but minutely reticu- 

 late-veined. Seeds in a single row in each cell, flat, surrounded by a wing. 

 Embryo straight ! or the short radicle only slightly bent in the direction w Inch 

 if continued would make the orbicular cotyledons accumbent. — Little biennial 

 or hyenial annuals, glabrous and stemless, with lyrate root-leaves and short 

 one - few-tiowered scapes. (Named in honor of the late M. C. Leavenworth.) 



1. L. Michaiixii, Torr. — On flat rocks and barrens, S. E. Kentucky and 

 southwestward : rare. March - May. — Scapes 2' -4' high. Petals purple, 

 rose color, or nearly white, with a golden. yellow or yellowish base, or rarely 

 yellow throughout? (L. aurca, Torr.), cuncate-obcordatc or cmarginate ; tlic 

 flowers rather large for the size of the plant. 



3. DENTARIA, L. TooxinvoRx. Pepper-root. 



Pod lanceolate, flat, as in Cardamine, but broader. Seedstalks bfoad and 

 flat. Cotyledons petioled, their margins somewhat infolding each other. — 

 Perennials, with long, horizontal, fleshy, sometimes interrupted, scaly or toothed 

 rootstocks, of a pleasant pungent taste ; the simple stems leafless below, bear- 

 ing 2 or 3 petioled compound leaves about the middle, and terminated by a 

 single corymb or short raceme of large white or purple flowers. (Name from 

 dtns, a tooth.) 



1. D. diph^lla, L. T\(X)tstnrlc loDfj and coiiliiiiioiis, toothed; stun-htiri'S 2, 

 simdiir to the nidiail oiiis, close together, of .3 rliombie-ovate coarsely toothed 

 leaflets; ])etals white. — Rich woods, Maine to Kentucky. May. — Rootstocks 

 5' -10' long, crisp, tasting like Water-Cress. 



2. D. maxima, Xutt. Rootstocfcinternipted, foiminij a strintf of thick toothed 

 tubers; stctn-htins (2-7) mostly 3 and ulli-rmtte ; hajlets 3, ovate, obtuse, coarsely 

 toothed and inci.sed, often 2-3-<'left ; petals pi-ik. (D. laciniata, var. ^, 'J'orr. 

 /ir Or.) — Northern New York (Watertown, Crawe; Utica, Paiiv) to Penii. ; 

 rare. M;iy. — ScMoni taller, but the leaves often smaller, than in No. 1. 



•5. D. heterophylla, Nutt. RootstocL a chain of '2 or 3 ti(irrow-ot)lon<j and 

 ohscureli] toothed tiili(r.i ; slem-ltaves 2 or 3, alternate (rarely opposite), divided into 

 L iL M-2.J 



