224 ORDER XIII. CRUCIFER.E. 



email ; petals linear Stigmas nearly sessile. Siliques erect or curved. 

 Seeds numerous. — Yellow. $. South Carolina. 5 — 12 inches. 



3. N. palus'tre, (D. C.) Leaves pinnatificl, 2 — 3 inches long, clasping 

 and ciliate at the base, lobes confluent, toothed, glabrous, oblong-lance- 

 olate. Flowers very small ; petals equal the sepals. Silique declined, 

 ovate-oblong, a little curved. — Yellow. T±. June to August. Wet 

 places. 1 — 2 feet. 



Genus II.— AR'ABIS. L. 14—2. {Rock Cress.) 

 (Named from the country, Arabia.) 



Silique linear, generally compressed, terminated by the ses- 

 sile stigma, valves 1-nerved. Seeds in one series, orbicular, 

 compressed. Calyx erect. 



1. A. Canadensis, (L.) Stem simple, glabrous toward the summits, 

 pubescent below. Leaves alternate, sessile, pubescent, oblong-lanceo- 

 late, remotely toothed, the lower ones petiolate and occasionally lyrate. 

 Flowers in long terminal racemes. Sepals hispid, colored. Petals ob- 

 long-linear, much longer than the sepals. Silique long, 2 — 3 inches, 

 linear, curved. — White. U. June. Middle Georgia. Sickle-pod. 



Genus III— CARDAM'INE. L. 14—2, 

 (From the Greek kardia, a heart.) 



Silique linear, usually dehiscing elastically, with revolute 

 valves ; valves nerveless. Sepals expanding at the summit. 

 Seeds ovate. 



1. C. spathula'ta, (Mich.) Stem decumbent, slender, glabrous. Rad- 

 ical leaves spatulate, pubescent, about an inch in length, entire ; cauline 

 ones narrow and somewhat toothed. Flowers in terminal and axillary 

 racemes. Sepals hairy, oval. Petals oblong and obovate. Silique 

 about an inch long. — White. 0. April. Mountains and Mid. Dist. of 

 Geo. and Car. 4 — 6 inches. 



2. C. Vikgin'ica, (L.) Stem erect, glabrous. Leaves alternate, pin- 

 nate, leaflets lanceolate, with a single tooth on one or both sides. Flow- 

 ers in terminal racemes, erect. Petals a little longer than the sepals ; 

 stigma sessile. "Varies much during the summer, and in different loca- 

 tions, so that any description may be inapplicable under different cir- 

 cumstances. — White. 1£. April to June. Upper districts of Geo. and 

 Car. 4 — 12 inches. 



The Pennsylvanica of Elliott, and Virginica, are supposed to be a 

 variety of the Hirsuta of Linnaeus. 



Genus IV.— DENTA'RIA. L. 14—2. {Tooth-wort. Pepper-root.) 



(From the Latin dens, a tooth.) 



Silique lanceolate, dehiscing elastically. Valves nerveless, 

 plane ; dissepiment somewhat fungous. Stigma emarginate. 

 Rhizoma fleshy, often dentate. Perennial, herbaceous plants, 

 with variously divided leaves. 



1. D. lacinia'ta, (Muhl.) Rhizoma moniliform, tubers slightly con- 

 nected. Leaves usually 3, ternate, leaflets incised or irregularly notch 



