CRUCIFERAE (MUSTARD FAMILY) 183 
the flowers leave behind a string of bead-like silicles of lesser 
diameter ; as they ripen the tiny balls become netted and pitted, 
growing smaller yet, until it would take a dozen to measure 
an inch. Each ball contains one small, yellow seed, which does 
not “shell” but drops from the plant, pod and all, looking like 
a speck of dry, brown earth; the seeds are a common impurity of 
poorly cleaned grain and are overlooked and mistaken for harmless 
dirt in seed wheat and oats. (Fig. 126.) 
Means of control the same as for Field Peppergrass. 
WILD RADISH 
Réphanus Raphanistrum, L. 
Other English names: Jointed Charlock, 
White Charlock. 
Introduced. Annual or biennial. Propa- 
gates by seeds. 
Time of bloom: June to September. 
Seed-time: July to October. 
Range: New Brunswick to Ontario, south- 
ward to Rhode Island, Pennsylvania and 
Ohio. Also in British Columbia. 
Habitat: Fields and waste places. 
Root slender, not swollen and fleshy like 
the garden radish. Stem fifteen to thirty 
inches tall, erect, branching, sparsely set 
with fine stiff hairs, or often entirely smooth. 
Basal and root leaves deeply pinnatifid, with 
terminal lobe large, and four to six pairs of 
lateral lobes, decreasing in size toward the 
petiole, which is short; upper leaves small 
and oblong, but all are toothed and scalloped. 
Flowers about a half-inch broad or some- 
times larger, the four spreading petals pale 
yellow with purple veins, fading to white as 
they wither; calyx-lobes drawn close to- 
gether, instead of spreading like those of 
Wild Mustard. Pods indehiscent siliques 
Fie. 127. — Wild 
one to two inches long, constricted between Radish (Raphanus Ra- 
the seeds, faintly grooved lengthwise but phanistrum). x%. 
