Ris 
Cruciferaceae 183 
SISYMBRIUM (Sophia) TANSY MUSTARD 
Annual or biennial, mostly tall and erect; pubescence branched or simple. Leaves 
lobed or pinnatifid (ours). Flowers yellow (ours) or white or rarely pink. Petals 
usually elongated. Stamens free. Stigma simple or 2-lobed. Pod elongated, linear, 
terete or flat; valves mostly 3-veined. Seeds many, in | or 2 rows in each cell, margin- 
less. (The Greek name of some plant of this family. ) 
A.  Pubescence none or of simple hairs; stigma 2-lobed; pod firm. 
B. Pod appressed, awl-shaped, |—1.5 cm. long. W.E. (Erysimum officinale.) 
S. officinale Scop. (Hedge Mustard) 
BB. Pod spreading, linear, 5—10 cm. long. W. E. 
S. altissimum L. (Tumbling Mustard) 
AA. Pubescence of stellate or occasional -forked hairs or reduced to minute granules ; 
stigma entire; pod delicate. 
C. Seeds in 2 rows in each cell of the pod. E. (Sophia pinnata.) 
S. canescens Nutt. (Tansy Mustard) 
CC. Seeds in | row in each cell of the pod. 
D. Leaves |—2-pinnatifid, subglabrous; pod 0.6—1.5 cm. long. 
FE. Pods 10—14 mm. long, spreading. 
‘ F.  Pedicels 4—6 mm. long, shorter than the pods. E. (S. incisa.) 
S. incisuam Engelm. (Western Tansy Mustard) 
FF. Pedicels 10—20 mm. long, longer than the pods. W. E. (S. longi- 
pedicellata; S. filipes.) 
S. incisum filipes Gray 
EE. Pods 3—6 mm. long, on ascending pedicels. W.E. (S. hartwegianum. ) 
S. incanum hartwegianum Wats. (Hartweg Tansy-Mustard) 
DD. Leaves 3-pinnate, canescent; pod about 2 cm. long. E. 
S. sophia L. (Flix-weed) 
SCHOENOCRAMBE PLAINS MUSTARD 
Perennial, glaucous, with horizontal branching rhizomes; whole plant often little 
leafy and of a reed-like appearance. Stem-leaves linear, entire or pinnate. Flowers yel- 
low, in racemes. Petals twice as long as the sepals; claw long. Stigma entire. Pod 
slender, terete, somewhat torulose; valves veinless or faintly |-veined. (Crambe is the 
genus of the Sea Kale, Gk. schoenos—a reed; nearly related to Crambe, and somewhat 
reed-like because the stem-leaves are few. ) 
A. Plant not glaucous; stem often branched, leafy. . E. 
S. linifolia Gr. 
AA. Plant glaucous; stem always simple, nearly leafless above. E. 
S. linifolia pinnata Nels. 
CAKILE SEA-ROCKET 
Annual, glabrous, branching, fleshy, diffuse or ascending. Leaves in ours oblanceo- 
late or obovate. Flowers purplish, in racemes. Petals long-clawed (ours), more than 
twice as long as the sepals (ours). Style none. Pod elongate, without stpie, indehiscent, 
‘slightly flat or terete or 4-ridged, 2-jointed; joints |-celled, |-seeded, the lower one not 
flattened. (Arabic name.) W. C, edentula Hook. (American Sea-rocket) 
BRASSICA MUSTARD 
, Annual or biennial, coarse, erect. Basal leaves pinnatifid or lyrate; stem-leaves 
7m 
