Vor. II.] MUSTARD FAMILY. 
2. Sophia pinnata (Walt.) Britton. ‘Tansy- 
Mustard. (Fig. 1767.) 
Erysimum pinnatum Walt. Fl. Car. 174. 1788. 
Sisymbrium canescens Nutt. Gen. 2: 68. 1818. 
Descurainia pinnata Britton, Mem. Torr. Club, §:173. 1894. 
Densely canescent nearly all over, pale; stem erect, 
branched, 8/—24/ tall, slender, the branches ascending. 
Leaves 2/-4’ long, oblong in outline, 2-pinnatifid into 
very numerous small toothed or entire obtuse segments; 
pedicels very slender, spreading nearly or quite at right 
angles to the axis, 5//-7’’ long, usually longer than the 
pods; flowers 1//-114’’ broad; pods horizontal or ascend- 
ing, oblong or linear-oblong, compressed, 3/’—4’’ long, 1/’ 
wide, glabrous or somewhat canescent; style minute; 
seeds plainly in 2 rows in each cell. 
In dry soil, Virginia to Florida and Texas. The western 
plants, commonly referred to this species, are here considered 
to belong mostly to the next. May-July. 
145 
3. Sophia incisa (Engelm.) Greene. 
Western Tansy-Mustard. (Fig. 1768.) 
Sisymbrium brachycarpon Richards. Frank, Journ. 
744. 1823? 
Sisymbrium incisum Engelm.; A. Gray, Mem. Am. 
Acad. 4:8. 1849. 
Descurainia incisa Britton, Mem. Torr. Club, 5: 173. 
1894. 
Saphe tncisa Greene, Pittonia, 3:95. 1896. 
Resembles the preceding species, but is greener, 
nearly glabrous, or the pubescence is mixed with 
short glandular hairs. Leaves pinnately divided, 
and the pinnae 1-2-pinnatifid into linear-oblong 
entire or toothed segments; fruiting pedicels 
widely ascending, filiform, 5’’-10’’ long, usually 
longer than the pods; pods 4’’-7’’ long, about 1/” 
thick, somewhat swollen, erect or ascending ; 
seeds in I or 2 rows. 
In dry soil, Minnesota to the Northwest Territory 
and British Columbia, south to Tennessee, Kansas, 
4. Sophia Hartwegiana (Fourn.) Greene. 
(Fig. 1769.) 
P allel Hartwegianum Fourn. Sisymb. 66. 
1865. 
Sisymbrium incisum var. Hartwegianum Brew. 
x Wats. Bot. Cal. 1:41. 1876. 
Descurainia Hartwegiana Britton, Mem. Torr. 
Club, 5:173. 1894. 
Sophia Harltwegiana Greene, Pittonia, 3:95. 1806. 
Similar to the two preceding species, densely 
minutely canescent or puberulent, stem 1°—2° 
tall, the branches slender, ascending. Leaves 
usually less finely dissected, pinnately divided 
into 5-7 pinnae, which are pinnatifid with ob- 
tuse segments and lobes; fruiting pedicels 
erect-appressed or closely ascending, 114//— 
4’’ long, shorter than or equalling the pods; 
pods erect or nearly so, linear, 4//-5/’ long, 
about 4’ thick; seeds in 1 row. 
In dry soil, Minnesota to the Northwest Territory 
and Oregon, south to Utah, Mexico and California. 
The northern plant may be distinct from the plant 
of Fournier, which was Mexican. May-July. 
Io 
Texas and California. 
May-Aug. 
Hartweg’s Tansy-Mustard. 
@B 
