56 
Spring Flora of Oklahoma 
white. Pods nearly orbicular when ripe, very flat, broadly winged 
all around, notched at the apex. Seeds rugose. 
In waste places. May-August. Oklahoma County. 
IX. SOPHIA Adans. 
Annual or perennial herbs, pubescent with short forked 
hairs, with slender, branching stems, 2-pinnatifid or finely 
dissected leaves, and small, yellow flowers in terminal 
racemes, the racemes much elongated in fruit. Calyx early 
deciduous. Style short. Stigma simple. Pods linear or 
linear-oblong, slender pedicelled, the valves 1-nerved. Seeds 
small, in 1 or 2 rows in each cell. 
Pedicels diverging nearly at right angles. 
1. S. pinnata. 
Pedicels ascending. 2. S. incisa. 
1. Sophia pinnata. (Walt) Howell. Tansy-mustard. Densely 
canescent to glabrate. Leaves oblong in outline, 2-pinnatifid into 
very numerous, small, toothed or entire obtuse segments. Pedicels 
spreading nearly or quite at right angles to the axis. Pods horizontal 
or ascending, oblong or linear-oblong, compressed, glabrous or some¬ 
what canescent. 
In dry soil. May-July. Common. 
2. Sophia inicisa (Engelm.) Greene. Western Tansy-mustard. 
Resembles the preceding species, but is greener, nearly glabrous, or 
the pubescence is mixed with short, glandular hairs. Leaves pin- 
nately divided, and the pinnre 1-2-pinnatifid into linear-oblong entire 
or toothed segments. Fruiting pedicels widely ascending. Pods some¬ 
what swollen, erect or ascending. 
In dry soil. May-August. Common. 
X. CHEIRINIA Link. 
Annual, biennial or perennial, erect and branching herbs, 
pubescent or hoary, with 2-branched hairs, leaves simple, 
entire, toothed or lobed. Flowers yellow. Pods elongated, 
linear, 4-angled. Valves keeled by a prominent midvein. 
Stigma lobed. Seeds in 1 row in each cell. 
1. Cheirinia asper (DO.) Britton. Yellow Flox. Rough, pu¬ 
bescent, or hoary, simple or branching above, lower leaves lanceo¬ 
late or linear, tapering into a petiole, dentate or sometimes entire, 
mainly acute. Upper leaves smaller, sessile or nearly so, entire or 
