CHEIRANTHUs. XU. CRUCIFERAE. 169 
ment largest. Upper leaves in 3 lanceolate segments placed at right angles. 
Flowers small, yellow, terminating the raceme, which becomes 1—2f long and 
environed by the appressed, sessile pods. Jn.—Sept. Medicinal. § 
2.8. Tuauiina, Gay. (Arabis. Linn.) Thalian Hedge Mustard. 
Lvs. subdentate and pilose, radical ones numerous and petiolate, oblong, 
cauline ones lanceolate ; cal. much shorter than the pedicels; siligues ascending, 
twice longer than the pedicels.—@) Rocks and sandy fields, Vt. to Ga. W. to 
Ky. Stem 4—12’ high, erect, with slender, erect branches, striate, pilose, often 
purple at base. Root leaves rosulate, 1—2’ long; cauline denticulate, ciliate, 
sessile, 6—12” by 1—3”. Pedicels spreading, 3—5” long. Flowers small, 
white. Siliques slender, straight, 7—10” long. Styles searcely any. May. 
3. S. Teres. T. & G. (Cardamine. Michz.) 
St. erect, branched; /vs. all somewhat lyrately pinnatifid; siliqgues short, 
linear, acuminate, on very short peduncles; 0 !1—@ Shores of Lake Cham- 
plain, Vt. Plant about 8’ high, slightly scabrous with very short hairs. Sili- 
ques erect, terete, 4’ in length, beaked with the short, slender style. Seeds 00. 
4. §. canescens. Nutt. 
Iws. bipinnately divided, canescent, lobes oblong or lanceolate, subden- 
tate or obtuse; pet. about equaling the calyx; sdigues oblong-linear, shorter 
than the pedicels—@ Arctic Sea to Flor. Plant 1—2f high, often nearly 
smooth. Leaves about 3’ long, sessile, segments 5—7 pairs, finely divided. 
Fils. very small. Siliques often erect, on spreading pedicels. Variable. 
20. ERYSIMUM. 
Gr. epvw, to cure ; from its salutary medicinal properties. 
Calyx closed; siliques columnar, 4-sided; stigma capitate; seeds 
in a single series; cotyledons oblong, 0]. 
1. E. CHEIRANTHOIDES. 
: Pubescence minute, appressed, branched; lws. lanceolate, denticulate or 
entire; siligue erect, spreading, twice longer than the Pg ot stig. small, 
nearly sessile—@ By streams and in wet grounds, U. 8. and Can., not ecom- 
mon. Stem erect, 1—2f high, often branched, and, with the leaves, scabrous. 
Leaves acute at each end, 1—2! long, } as wide. Flowers small, yellow, in 
long racemes. Siliques 4’ to near 1’ in length, linear, and somewhat spread- 
ing. 
2. E. ArKaNSANUM. Nutt. Yellow Phlox. False Wall-Flower. 
Scabrous, with an appressed pubescence; st. simple; Ws. linear-lanceo- 
late, remotely dentate, sessile, lower ones runcinate-toothed ; inflorescence race- 
mose, corymbed at summit; szligues long, 4-angled, suberect; stig. capitate — 
© A fine plant with large, showy flowers, resembling the wall-flower. Banks 
of Scioto, Sullivant. Arkansas, Nuttall. Bluffs of the Wabash! Wood. Iu. 
Mead! Stem 1—3f high, slender. Leaves 2—3! by3—6"”. Sepalsstraw-color. 
Petals large, bright orange-yellow. Siliques 3’ long. Jn. Jl. 
21. CHEIRANTHUS. 
Arabic kheyry, the name of a certain plant, and Gr. avSos, flower. 
Calyx closed, 2 of the sepals gibbous at base; petals dilated ; 
Bilique terete or compressed ; stigma 2-lobed or capitate; seeds flat, 
in a single series, often margined, 0=. 
1. C. nesperiDoipes. T.&G. (Hesperis pinnatifida. Mich.) 
Glabrous; lower lvs. lyrate-pinnatifid, wpper lanceolate, attenuate at base, 
unequally and sharply serrate-dentate, acuminate; pedicels as long as the calyx; 
pet. obovate-spatulate, obtuse; silique terete; stig. capitate; sds. margined.— 
2 Penn. to IlL!S.to Ark. Stem slender, furrowed, 2~3f high. Leeves thin, ~ 
3—5’ long, 4 as wide, those of the stem scarcely petiolate. Racemes terminal 
and axillary. Calyx shorter than the claws of the violet-colored petals. Siliques 
torulose, 15—20’ long; seeds oblong, plano-convex, with a narrow border. 
May, Jn. 
