This section is from the book "An Illustrated Flora Of The Northern United States, Canada And The British Possessions Vol2", by Nathaniel Lord Britton, Addison Brown. Also available from Amazon: An Illustrated Flora of the Northern United States, Canada and the British Possessions. 3 Volume Set..
Chenopodium album var. leptophyllum Moq. in DC.
Prodr. 132: 71. 1849. Chenopodium leptophyllum Nutt.; Moq. in DC. Prodr.
132: 71. As synonym. 1849. Chenopodium leptophyllum var. oblongifolium S. Wats.
Proc. Am. Acad. 9: 95. 1874. Chenopodium leptophyllum subglabrum S. Wats. Prop.
Annual, scarcely succulent, stem slender, usually erect, striate or grooved, at least when dry, branched, 6'-2 1/2o tall, mealy above, the branches erect-ascending. Leaves linear to oblong, white-mealy beneath, green above, acute or acuminate, or the lower obtuse, entire or the lower rarely toothed, short-peti-oled, 1/2'-1 1/2' long, l"-3" wide, 1-3-nerved; flowers in continuous or interrupted axillary and terminal simple or branched spikes; calyx about \" broad, its segments strongly keeled and nearly covering the fruit; styles short; seed horizontal, readily detached from the pericarp; embryo a complete ring.
Chenopodium Vulvaria L. Sp. Pl. 220. 1753.
Annual, white-mealy, unpleasantly odorous, much branched, the procumbent branches 1° long or more. Leaves broadly ovate, entire, 1' long or less, the slender petioles about as long as the blades; flowers in dense short axillary and terminal simple or branched spikes mostly shorter than the leaves; calyx-segments ovate-lanceolate, keeled in fruit, obtusish; seed horizontal, shining, the pericarp coherent; styles short.
Waste grounds, Ontario to Delaware and Florida. Ad-ventive from Europe. July-Sept.
Chenopodium polyspermum L. Sp. Pl. 220. 1753.
Annual, glabrous, not mealy, stem stout or slender, erect or decumbent, commonly much branched, striate, 6'-3° high. Leaves oblong, elliptic or ovate, slender-petioled, entire, thin, green on both sides, obtuse at the apex, narrowed rounded or truncate at the base, 1' - 3' long, 4"-1 1/2' wide; flowers in loose axillary and terminal panicles; calyx less than 1" wide, its segments oblong, subacute or obtuse, somewhat scarious, not keeled, not completely covering the top of the fruit; styles short; seed firmly attached to the pericarp, horizontal; embryo a complete ring.
In waste places and ballast, Massachusetts to New Jersey. Adventive from Europe. July-Sept. Allseed.