BALL MUSTARD, Neslia
paniculata (L.) Desv. 1, plant with flowers and fruit; 2,
stem and leaves; 3, taproot and lower leaves; 4, flower.
Annual or biennial, reproducing by seed. Stems branched
above, slender, hairy, yellow-green, erect, 1 to 2 feet (30 to 60 cm) tall.
Leaves on stems alternate, 1 to 2-1/2 inches (2.5 to 6.3 cm) long,
hairy, arrow-shaped. The leaf base nearly encloses the stem and the tip
is blunt to pointed. Lower leaves broad, narrowed at the base with a round
tip. Flowers yellow, 4 petaled, produced on racemes 2 to 10 inches
(5 to 25 cm) long. Seed pods round, about 1/8 inch (3 mm)
in diameter, gray-brown with definite netlike surface markings. Each pod
contains 1 seed, which is hard to separate from pod. Seeds yellow,
about the size of white clover seeds. Found especially in grain
fields and waste places.