An illustrated flora of the An illustrated flora of the northern United States, Canada and the British possessions : from Newfoundland to the parallel of the southern boundary of Virginia and from the Atlantic Ocean westward to the 102nd meridian ed2illustratedflo02brit Year: 1913 39. SINAPIS L. Sp. PI. 668. 1753. Annual or biennial, usually erect, branching more or less Ijispid herbs, with pinnatifid or lobed leaves, and rather large, mostly yellow flowers in terminal racemes. Siliques linear, nearly terete, constricted between the seeds, sessile in the , smooth or densely hispid, tipp
An illustrated flora of the An illustrated flora of the northern United States, Canada and the British possessions : from Newfoundland to the parallel of the southern boundary of Virginia and from the Atlantic Ocean westward to the 102nd meridian ed2illustratedflo02brit Year: 1913 39. SINAPIS L. Sp. PI. 668. 1753. Annual or biennial, usually erect, branching more or less Ijispid herbs, with pinnatifid or lobed leaves, and rather large, mostly yellow flowers in terminal racemes. Siliques linear, nearly terete, constricted between the seeds, sessile in the , smooth or densely hispid, tipped with a very long flat sword-like or angled beak which often contains a seed near its base, the valves 3-nerved. Seeds subglobose, in one row in each cell, not winged nor margined. Cotyledons conduplicate. [Name Greek, said to come from the Celtic for turnip] About 5 species, natives of southern Europe. Type species: Sinapis alba L. Leaves lyrate pinnatifid; fruiting pedicels 4'-5' long. i. Leaves dentate or lobed ; fruiting pedicels z'-3' long. 2. S. arveiisis. Sinapis alba L. White Mustard. Charlock. Fig. 2102. 2: 39. 1839-45. Erect, annual, i°-2° high, more or less pu- bescent with stiff spreading hairs. Lower leaves 6'-8' long, obovate in outline, deeply pinnatifid or pinnate, with a large terminal leaflet or lobe and several pairs of smaller lateral ones, dentate all around; uppermost leaves lanceolate or oblong, often merely dentate, short-petioled; flowers yellow. 7'- 9' broad; pedicels rather stout, spreading, 5'-7' long in fruit; pods spreading or ascending, terete, constricted between the seeds; beak flat, equalling or sometimes longer than the rest of the pod; seeds light brown. In waste places and fields, occasional, mostly escaped from cultivation. Adventive from Eu- rope. Native also of western Asia. Senvie. Ked- lock. Summer.
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