HOARY CRESS, Cardaria
draba (L.) Desv. 1, flower; 2, mature pod; 3,
seed; 4, new shoot; 5, plant in bloom; 6, root system.
Perennial, reproducing by seeds and rootstocks. Roots deep,
penetrating, slender, extending horizontally and vertically as much as
10 feet (3 m). Stems 1 to 1-1/2 feet (30 to 45 cm) tall, branching
little except at top, covered with whitish hairs. Leaves on lower
stem spatulate, tapering to a slender base; upper leaves sessile, clasping
stem. Leaf margins wavy with shallow indentations. Leaves covered with
whitish pubescence. Flowers white, 4 petaled, borne in flat-topped
clusters. Seed pods 2-parted, heart-shaped, borne on racemes
2 to 4 inches (5 to 10 cm) long. Seeds oval, rough, about 1/16 inch
(1.5 mm) long, reddish-brown, seed coat marked by many small netlike depressions.
Found in dry areas, in all crops where established, especially pastures
and meadows, and on sandy ridges. It is very persistent and hard to eradicate.
There is another species of Cardariar similar to the above plant.