Herbs with entire exstipulate leaves (but sometimes with glands in place of stipules), and regular hypogynous flowers. Sepals, petals, stamens, and styles, 5 each. Filaments united at the base. Pod 10-celled, 10-seeded. Our only genus is Linum
1. L. Virginia'num, L. (Virginia F.) Flowers yellow, small ( 1/4 of an inch long), scattered. Stem erect, it and the spreading branches terete. Leaves lanceolate and acute, the lower obtuse and opposite. No glands, styles distinct. - Dry soil.
2. L. Stria'turn, Walt., has the branches wing-angled, broader leaves and more crowded flowers than No. 1. The whole plant is stouter. - Shores of the Great Lakes.
3. L. sulcatum, Riddell, has yellow flowers twice as large as the preceding, wing-angled branches, and a pair of dark glands in place of stipules. Sepals strongly 3-nerved, with rough bristly margins. Styles united to the middle. - Dry soil, rare.
4. L. rig'idum, Pursh. Glaucous. Flowers yellow, large. Sepals lanceolate, glandular-serrulate. Branches rigid, angled. Stipular glands usually present. Styles united. N.W.
5. L. peren'ne, L., var. Lewisii, Eat. and Wright. Flowers blue, on long peduncles. Perennial, glabrous and glaucous, leaves linear, acute. Styles distinct. Pod ovate. - N.W.
6. L. usitatis'simum, L. (Common F.) Annual. Flowers blue, the sepals ciliate. Leaves alternate, linear-lanceolate, acute, 3-veined. - Cultivated grounds.