TorRITIS. XI. CRUCIFERZ. 165 
1. N. orricinite. R.Br. (Sisymbrium Nast. Linn.) English Water Cress. 
Iws. pinnate ; ifts. ovate, subcordate, repand; pet. white, longer than the 
calyx.— Brooks and ponds. Stems decumbent, If long, thick, with axillary 
branches. Leaves of 3—7 leaflets; leaflets broad, often cordate, rather acute, 
obtusely toothed, terminal one largest. Flowers corymbed. Siliques less than 
1’ long. Jn.—It is beginning to be cultivated in the vicinity of our cities asa 
salad. Qt 
2. N. ampuizium. R.Br. (Sisymbrium. Linn.) Amphibious Water Cress. 
Lws. oblong-lanceolate, pinnatifid or serrate; 7¢. fibrous; pet. longer than 
the calyx; siligue elliptical, acute at base, tipped with the mucronate style.— 
2% Banks of the Mohawk, Dr. Robbins. Rare. Stem 1—2f high, furrowed. 
Leaves variable, immersed ones ‘pinnatifid or pectinate, upper ones serrate. 
Flowers yellow, minute, in a long, dense raceme. Silique half as long as the 
spreading or reflexed peduncle, pointed with the short style. Jn. JL 
3. N. patustreE. DC. Marsh Water Cress. 
Lws. pinnately lobed, amplexicaul, lobes confluent, dentate, smooth; 7%. 
fusiform ; pet. as long as the sepals; siligue spreading, turgid, obtuse at each 
end.— In wet places. Stem 1—2f high, erect, branched above. Leaves 2—3 
long, all more or less pinnatifid, smooth, except a few ciliz at base. Flowers 
Para minute, yellow. Silique 3—4” long, on pedicels of equal length. 
n.—Aug. 
4. N. nispipum. DC. (Sisymbrium. Poiret.) Hispid Water Cress. 
St. villous ; lvs. somewhat villous, runcinate-pinnatifid, lobes rather ob- 
tusely dentate ; siligues (rather silicles) ovate, tumid, pointed with the style, 
scarcely more than half as long as the pedicels; pet. scarcely as long as the 
calyx.—2| Banks of streams, Walpole, N. H., Conn. to Penn. Stem angular, 
branched, 1—3f high, with many paniculate racemes-above. Leaves 3—6 
long. Flowers minute, yellow. Silicles 1” long, on pedicels 2—3” long and 
somewhat spreading. 
5. N. natans. DC. (. Americanum. Gray. Floating Water Cress. 
_Emersed lws. serrate, oblong-linear, undivided, immersed ones doubly 
pinnatifid, with capillary segments ; pet. twice as long as the calyx; siliques 
obovate, twice as long as the style—®% In water, Can. and U.S. Stem long, 
submerged. Flowers white, middle size. Jl. 
6. N. syivestre. (Sisymbrium vulgare. Pers.) Creeping Water Cress. 
Lws. pinnately divided, segments lanceolate, incisely serrate; pet. longer 
than the calyx; siligues oblong, torulose; sty. very short—Banks of the Dela- 
ware near Philadelphia. Nuttall. § 
13. BARBAREA. R. Br. 
In honor of St. Barbara, who discovered (what no one has since perceived) its medicinal virtues. 
Sepals erect, subequal at base ; silique columnar, 2—4-cornered ; 
valves concave-carinate; seeds in a single series ; 0=.—Lvs. lyrately 
pinnatifid. Fils. yellow. 
B. vunearis. R. Br. (Erysimum Barbarea. Linn.) Winter Cress. | 
Lower lvs. lyrate, the terminal lobe roundish, wpper ones obovate, pin- 
natifid at base, erenate or repand-dentate; siliques obscurely 4-cornered.— 2 In 
old fields, also brook-sides, Northern States, W. to Oregon, common. Whole 
plant glabrous. Stem furrowed, 1—2f high, branching above. Leaves 1—3 4 
long, dark green, shining, on clasping petioles, the terminal lobe 1—14’ diam., 
upper ones sessile, all with obtuse teeth. Flowers on pedicels }/ long, in ter- 
minal racemes. Siliques slender, ?/ long, curved upwards. May, Jn. 
14. TURRITIS. Dillon. 
Lat. turritis, turreted ; from the pyramidal form of the plant. 
Sepals erect, converging ; petals erect ; silique long, linear, 2-edged ; 
valves plane; seeds in a double series, 0=.—Fils. cyante, 
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