L. Michauxii Torr. (and L. aurea Torn). On wet rocks S. E. Ky. to Texas. Plant 2 - 6' high. Lvs. mostly radical, an inch or two in length, segm. 1 - 5, angular. Fls. at first solitary, on slender scapes, finally racemed. Petals twice longer than the sepals, yellow, at least its broad claws. Pod3 erect, 3 - 5-seeded. Mar., Apr. (Cardamine uniflora. Mx.)
10. BARBAREA, R. Br. Winter Cress. (In honor of St. Barbara who discovered [what are since unknown] its medicinal properties.) Sepals erect; siliques columnar, 2 or 4-angled, valves carinate with a mid-vein; seeds in a single row (0 = ). - Lvs. lyrate-pinnatifid. Fls. yellow.
1 B. vulgaris R. Br. Upper lvs. toothed or pinnatifid at base; siliques obscurely 4-angled, pointed with the style.- Fields and brooksides, common, N. States. Whole plant glabrous. St. furrowed, 1 - 2f high, branching above. Lower lvs. lyrate pinnatifid, with small, oblong pinnae, and a large, broad-ovate, terminal lobe, dark green, shining, with clasping petioles; upper lvs. sessile, all very obtuse. - Fls. in dense racemes. Pods about 9" long, usually curved, ascending or erect. May, Jn.
2 B. precox R. Br. Belle isle Cress. Scurvy Grass. Upper lvs. pinnatifid, with the lobes all linear-oblong; silique 2-edged.- Cultivated southward for salad, and sparingly naturalized. St. slender, 1 f high. Lower lvs. with the terminal lobe ovate. Siliques 2 or 3' long. Apr., Jn.
11. ERYSIMUM, L. False Wall Flower. (Gr. ερύω), to cure; from its salutary medicinal properties.) Calyx closed; siliques columnar, 3-sided, valves with a strong mid-vein; stigma capitate; seeds in a single series; cotyledons oblong, 0||. - Fls. yellow.
1 E. cheiranthoides L. Pubescence minute, appressed, branched; lvs. lanceolate, denticulate, or entire; fls. small; siliques short (8 - 10"), on slender, spreading pedicels; stig. small, nearly sessile.- By streams and in wet grounds, U. S. and Can., not common. St. erect, 1 - 2f high, often branched, and, with the leaves, scabrous. Lvs. acute at each end, 1 - 2' long, 1/3 as wide. Fls. small, yellow, in long racemes. Siliques 1/2 to near 1' in length, linear, and somewhat spreading. Jl.
2 E. Arkansanum Nutt. Yellow Phlox. Scabrous, with an appressed pubescence; st. simple; lvs. linear-lanceolate, remotely dentate, sessile, lower ones runcinate-toothed; inflorescence racemous, corymbed at summit; siliques long (3'), erect, on short, erect pedicels; stig. capitate.- A fine plant, with large, showy flowers, resembling the wall-flower, on bluffs along rivers, Ohio to Ark. St. 1 - 3f high, slender. Lvs. 2 - 3' by 3 - 6". Sep. straw-colored. Petals large, bright-orange yellow. Siliques 3' long. Jn., Jl.
12. SISYMBRIUM, Allioni. (An ancient Greek name.) Calyx half-spreading, equal at base; petals unguiculate, entire: silique subterete, valves concave, marked lengthwise with 1 - 3 veins; style very short; seeds in a single series, ovoid, 0||. - Fls. (yellow) small.
1 S. officinale Scop. Hedge Mustard. Lvs. runcinate; rac. slender, virgate; siliques subulate, erect, closely appressed to the rachis. - A common weed, in fields, roadsides, rubbish, etc., Can. and U. S. St. 1 - 3f high, with spreading branches. Lower lvs. 3 - 8' by 1 - 3', the lower segments placed at right angles to the midvein, or pointing backwards, the terminal segment largest. Upper lvs.
in 3 lanceolate segments at right angles. Fls. small, yellow, terminating the raeeme, which becomes 1 - 2f long, and environed by the appressed sessile pods. Jn., Sept. Medicinal. § Eur.
2 S. Sophia L. Flixweed. Lvs. bipinnatifid, lobes linear-oblong, acute, incised; sepals longer than the petals; silique linear, slender, erect, longer than the spreading pedicel. - Plattsburg, N. Y. (Mrs. Conant), and Can. along the St. Lawrence. Stems erect, 1 - 2f high. Leaves ovate in outline, finely dissected, almost tripin-natifid. Fls. very small, pale yellow. Siliques 1' long, very narrow, in long racemes. July.
3 S. canescens Nutt. Tansey Mustard. Lvs. bipinnately divided, canescent, lobes oblong or lanceolate, subdentate, obtuse; petals about equalling the calyx; siliques oblong-linear, ascending, shorter (or never longer) than the spreading pedicels.- Arctic Sea to Florida. Plant 1 - 2f high, often nearly smooth. Lvs. about 3' long, sessile, lance-oblong in outline, segm. 5 - 7 pahs, finely divided. Fls. very small. Siliques 3 - 6" in length, the seeds somewhat 2-rowed. Variable. Mar., Jn.
13. WAREA, Nutt. (Named in honor of Mr. Ware, the discoverer.) Sepals colored, ligulate; petals with very slender claws, longer than the lamina; silique flattened, long and slender, raised on a slender stipe; stamens nearly equal, 0||.- Glabrous, entire-leaved plants, with the aspect of Cleome. Fls. white or purple, in short racemes. Siliques curved and declinate.
1 W. cuneifolia Nutt. Lvs. oblong, obtuse, cuneate at base, and sub-sessile.- Dry hills, Ga. (Mettauer) and Fla. St. 1 - 2f high, branched above. Lvs. 1/2 - 1' long, rather thick, the upper linear. Fls. in showy clusters at the summits of the branches, white or purplish. Pedicels divergent. Sta. exserted, with the anthers finally circinate. Petals with remarkably slender claws 2" in length, lamina 1". Siliques 1 1/2' or more in length, 4 times longer than the filiform stipe. Jn., Aug.
2 W. amplexifolia Nutt. Lvs. oblong-ovate, partly clasping.- Fla. In all other respects like No. 1, and in all probability not distinct from it.