. A manual of weeds : with descriptions of all the most pernicious and troublesome plants in the United States and Canada, their habits of growth and distribution, with methods of control . Weeds. 188 CBUCIFERAE (MUSTARD FAMILY) Fig, Stems two to seven feet tall, or even more in warm southern soil, branching widely, sometimes hairy near the base but usually smooth above. Lower leaves pinnatifid, with the terminal lobe very large and the several lateral lobes small, toothed all around, with a long, slim petiole; upper leaves less divided, becom- ing lance-shaped and nearly sessile at the top. F
. A manual of weeds : with descriptions of all the most pernicious and troublesome plants in the United States and Canada, their habits of growth and distribution, with methods of control . Weeds. 188 CBUCIFERAE (MUSTARD FAMILY) Fig, Stems two to seven feet tall, or even more in warm southern soil, branching widely, sometimes hairy near the base but usually smooth above. Lower leaves pinnatifid, with the terminal lobe very large and the several lateral lobes small, toothed all around, with a long, slim petiole; upper leaves less divided, becom- ing lance-shaped and nearly sessile at the top. Flowers bright yellow, a little more than a quarter-inch broad. This plant is often confused with Charlock, or Wild Mustard, but the difference between the fruits readily distinguishes them: Char- lock has long, knotted or wavy pods, with stout, two-edged beaks, while Black Mus- tard has short, smooth, four-angled pods, a half-inch to an inch long, with short, slim beaks; and they are held closely pressed to the stalk, making the raceme veryslender. Seeds globular, almost black, very pungent to the taste. (Fig. 131.) Means of control the same as 131. — Black Mustard (.Brassica nigra). SAND ROCKET Diplotdxis murdlis, DC. Introduced. Annual or biennial. Propagates by seeds. Time of bloom: June to August. Seed-time: July to September. Range: Nova Scotia to New Jersey and Pennsylvania, westward to Michigan. Habitat: Fields and waste places. Not a common weed in this country as yet, but Professor Beal reports that wherever found in Michigan, it " thrives and spreads at an alarming ; Stem one to two feet high, smooth or sparsely set with bristly hairs, branching from the base, leafy only below. Leaves oblong to. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Georgia, Ada Eljiva, 185
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectweeds, bookyear1919
