386 TETRADYNAMIA S1LIQU0SA 



inches high, simple, striate, more or less pubescent. Leaves usually 3, near tht 

 summit of the stem, each mostly 3-parted to the base ; segments an inch and half 

 to 3 or 4 inches long, and 1 fourth to 3 fourths of an inch wide, lance-linear, acute > 

 or often obtuse, mucronate, mostly laciniate-serrate, smooihish,or slightly pubes- 

 cent; petioles half an inch to an inch and half long; sometimes, but rarely, a 

 laciniate radical leaf on a long petiole. Raceme terminal, loose, at first corym- 

 bose, finally 2 or 3 inches long ; pedicels half an inch to an inch long, pubescent. 

 Sepals linear-oblong, 1 third of an inch in length, with a white margin. Petals 

 pale rose-color, or sometimes nearly white, about 9 fourths of an inch long, cune- 

 ate-obovate, attenuated below. Siliques about an inch long, lance-linear, tapering 

 at apex, and pointed with the style which is 1 fourth to near half an inch long; 

 septum thick at the margins. Seeds ovate-oblong, obtuse, reddish brown \ funi- 

 culus flat, dilated. 



Ilab. Rich woodlands : frequent. Fl. April. Fr. June. 



Obs. The tubers of this are warmly acrid. Five or six additional species arc 

 enumerated in the U. States. 



319. SISYMBRIUM. All. Nutt. Gen. 560. 



[An ancient Greek name ; applied to this genus] 



Calyx equal at base, closed, or spreading. Petals unguiculate, entire. 

 Filaments without teeth. Silique subteicte, or angular; valves con- 

 cave ; style very short. Seeds in a single series, ovate, or oblong; 

 cotyledons incumbent (sometimes obliquely), flat. 



1. S. officinale, Scop. Lower leaves runcinate, upper ones sub- 

 hastate ; racemes spikeform, slender and virgate ; siliques erect, subu- 

 late, subsessile, appressed to tht rachis. Becky Bot. p. 33. 

 Erysimum officinale. Willd. Sp. 3. p. 509. Mx. Am. 2. p. 31. Per*. 

 Syn. 2. p. 199. JYIuhl. Catal. p. 61. Pursh, Am. 2. p. 436. Nun. 

 Gen. 2. p. 68. Bart. Phil. 2. p. 55. Ell. Sk\ 2. p. 148. Bigel. Bast, 

 p. 253, Florid. Cestr. p. 74. 



Officinal Sisymbrium. Vulgd — Hedge Mustard, 

 Ga///cP-Herbe au Chantre. Germ. -Dor Hederich. ///.v//.-Jaram&go. 

 Root annual. Stem 1 to 3 feet high, terete, pilose with acute and rathe? retrorse 

 hairs, branched, branches spreading. Leaves mora or less pilose, especially on 

 the under surface, petiolate ; lower leaves 3 or 4 to 6 or 8 inches long, and 2 to 4 

 inches wide, somewhat runcinately pinnatifid ; upper leaves smaller, sub-lanceo- 

 late, sinuate-dentate, mostly hastate-lobed at base ; petioles half an inch to 1 or 2 

 inches long, somewhat margined. Ihiccmes elongating, 6 to 12 or 15 inches in 

 length, slender; pedicels clavate, thick, and very short (scarcely a line in length), 

 erect. Petals greenish yellow, small, longer than the calyx, cunealc-oblong. 

 Siliques half an inch to 3 quarters in length, smooth, terete-subulate, or somewhat 

 nerved and angular, tapering at apex, closely appressed to the rachis. 



Hob. Cultivated grounds, lanes, &. roadsides ; common. Fl. May- Aug. Fr. Aug-Oct. 

 Obs. A naturalized foreigner ; and somewhat troublesome as a tceed. It was 

 formerly in some repute, as a remedy for hoarseness, coughs, &c,— but was proba- 

 bly much overrated, and is now neglected. 



2. S. canescens ? Nutt. var. major ? Hook. Subcanescent and glau- 

 cous ; leaves bipinnatifid, segments ovate-oblong, and lance-linear, ob- 

 tuse, dentate, or entire ; racemes elongated, loose, petals as long as the 



