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..
Erect annual herbs, with entire toothed or pinnatifid leaves, and small yellowish flowers. Silicles obovoid or pear-shaped, slightly flattened; valves very convex, I-nerved. Seeds several or numerous in each cell, oblong, marginless, arranged in 2 rows. Stigma entire; style slender. Cotyledons incumbent. [Greek, low flax.]
A genus of about 5 species, natives of Europe and eastern Asia. Type species: Camelina saliva (L.) Crantz.
Glabrous, or nearly so; pod 3"-4" long.
Pubescent, at least below; pod 2"-3" long.
Myagrum sativum L. Sp. Pl. 641. 1753.
Camelina sativa Crantz, Stirp. Austr. 1:18. 1762.
Glabrous, or nearly so, simple, or branching above, 1°-2° high. Lowest leaves petioled, entire or toothed, 2'-3' long, lanceolate, acutish; upper leaves sessile, smaller, clasping by a sagittate base, mostly entire; pedicels slender, spreading or ascending, 6"-10" long in fruit; flowers numerous, about 3" long; pod obovoid or pyriform, margined, slightly flattened, 3"-4" long, about 2"-3" wide; style slender, 1 1/2" long.
In fields (especially where flax has been grown) and waste places, Nova Scotia to British Columbia, Pennsylvania, Kansas and California, naturalized from Europe. Old name, myàgrum. Cultivated in Europe for the fine oil of its seeds; nutritious to cattle. Oil-seed. Siberian oilseed. Cheat. Madwort. June-July.
Camelina microcarpa Andrz.; DC. Syst. 2: 517. 1821. Camelina sylvestris Wallr. Sched. Crit. 347. 1822.
Stem pubescent, at least below, simple or with few elongated branches. Leaves lanceolate, sessile, auricled, or the lower narrowed at the base; fruiting racemes much elongated, often 1° long or more; pedicels relatively somewhat shorter than those of C. sativa; pod smaller, rather more flattened, 2"-^" long, strongly margined.
In waste places, Ontario to Rhode Island, Virginia, British Columbia, Kansas and Arizona. Naturalized or adventive from Europe. May-July.