CKUCIFEE^. (mUSTAKD FAMILY.) 81 



pods ovoid, one-celled, a little longer than the sfj/le. % (N. natans, ed.\. N. natans, 

 var. Americanum, Gray. Armoracia Americana, Am.) — Lakes and rivers, 

 N. New York to Illinois and Kentucky. July. 



8. W. ArmokXcia, Fries. (Horsekadish.) Eoot-leaves very large, ob- 

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

 ascending; j^ods globular (seldom formed); style very short. 1). (Cochlearia 

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

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



2. lODANTHUS, Torr. & Gray. False Rocket. 



Pod linear, elongated, terete ; the valves nerveless. Seeds in a single row in 

 each cell, not margined. Cotyledons accumbent. Claws of the violet-purple 

 petals longer than the calyx. — A smooth perennial, with ovate-oblong pointed 

 and toothed leaves, the lowest sometimes lyrate-pinnatifid, and showy flowers in 

 panicled racemes. (Name from laSris, violet-coUn-ed, and avBos, flower.) 



1. I. hesperidoldes, Torr. & Gray. (Hfesperis pinnatifida, Michx.) — 

 Banks of rivers, west of the Alleghanies. May, June. — Stem l°-3° high. 

 Petals 5" long, spatulate. Pods 1' to nearly 2' long, somewhat cm-ved upwards. 



3. LiEAVEWWORTHIA, Torr. Lbavenwobthia. 



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

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

 bryo straight ! or the short radicle only slightly bent in the direction which if 

 continued would make the orbicular cotyledons accumbent. — Little biennials or 

 hyemal annuals, glabrous and steraless, with lyrate root-leaves and short one - 

 few-flowered scapes. (Named in honor of Dr. M. 0. Leavenworth, the discoverer 

 of one species.) 



1. !<• Micliauxii, Torr. Scapes oneflowered ; petals white or purplish, 

 yellowish towtirds the base. (Cardamine uniflora, Michx.) — On flat rocks. 

 Southeastern Kentucky (also Tennessee and Alabama, whence Prof. Batch sends 

 it with pui-ple flowers). March, April. 



2. Til. aiiirea, Torr. Scapes 1 - Sflowered; petals yeUow, larger than in the 

 Other (perhaps not distinct). — With No. 1, and southwestward. 



4. MENTAKIA, L. Toothwoet. Pepper-boot. 



Pod lanceolate, flat, as in Cardamine, but broader. Seed-stalks broad and 

 flat. — Perennials, with long, horizontal, fleshy, sometimes interrupted, toothed 

 rootstocks of a pleasant pungent taste ; the low simple stems bearing 2 or 3 

 petioled compound loaves about the middle, and terminated by a single raceme 

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



1. D. dipliylla, L. Rootstock long and continuous, toothed; stem-leaves 2, 

 similar to the radical ones, close together, of 3 rhombic-ovate coarsely toothed 

 leaflets. — Rich woods, Maine to Kentucky. May. — Rootstocks 5'-10'long, 

 crisp, tasting like Water-Cress. Flowers white. 



