182 CRUCIFERAE (MUSTARD FAMILY) 
shaped, the base narrowing toa petiole, entire or very slightly toothed, 
somewhat hairy, especially those that form the rosettes of autumn 
plants ; upper leaves smooth, arrow-shaped, clasping the stem by an 
auricled base. Flowers yellow, very small, in racemose clusters, the 
pedicels at first fine and threadlike but lengthening and becoming 
wiry as the pods mature. The latter are pear-shaped, two-celled 
silicles and resemble a flax boll, though they are not quite so large; 
slightly flattened, with a marginal ridge, and tipped with the per- 
sistent style which splits with the pod. Seeds brownish yellow, 
about ten to each pod. In the company of this plant is often 
found the Small-Fruited False Flax (Camélina 
macrocérpa, Andrz.), smaller and more slender, 
with pods not much more than half as large but 
the plant is said to be even more prolific than 
the commoner weed. 
Means of control similar to those given for 
Hare’s-ear and Indian Mustard, the smooth foli- 
age not being susceptible to injury from spray. 
BALL MUSTARD 
Néslia paniculata, Desv. 
Heed. Annual or biennial. Propagates by 
seeds. 
Time of bloom: June to September. 
Seed-time: July to October. 
Range: Ontario, Manitoba, and British Colum- 
bia, Minnesota and the Dakotas. 
Habitat: Grain fields and waste places. 
Stem one to two feet tall, slender, usually sim- 
ple to the flowering stalk, finely roughened with 
forking hairs. Basal leaves oblong to lance- 
shaped, tapering to a slim petiole; those on the 
stem arrow-shaped, long-pointed, clasping the 
stem with auricled base; all clothed with fine, 
branching hairs. Flowers in a terminal panicle, 
- containing several slender racemes tipped with 
ta. 126.— Ball 
Mustard (Neslia Small clusters of orange-colored blossoms, not 
paniculata). X%. more than an eighth of an inch across; maturing, 
