Order 13.— CURCIFErLE. 233 



silique flat, linear or oblong, valves indistinctly veined ; seeds in a single 

 row, flattened, wing-margined ; embryo nearly straight, curving towards 

 an accumbent form. — @ Low, smooth herbs with lyrate-pinnatifid lvs. 

 Fls. yellowish. 



L. Michauxii Torr. (and L. aurea Torr.). 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 twica 

 longer than the sepals, yellow, at least its broad claws. Pods erect, 3 — 5 -seeded. 

 Mar., Apr. (Cardamine uniflora. Mx.) 



10. BARBAREA, R. Br. Winter Cress. (In honor of St. Bar- 

 bara who discovered [what are since unknown] its medicinal proper- 

 ties.) 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. — D 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. — Fte. 

 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. pinnati- 

 fid, with the lobes all linear-oblong; silique 2-edged. — % Cultivated southward 

 for salad, and sparingly naturalized. St. slender, If high. Lower lvs. with the 

 terminal lobe ovate. Siliques 2 or 3' long. Apr., Jn. 



/ 



11. ERYSIMUM, L. False Wall Flower. (Gr. epvo), to cure ; from 

 its salutary medicinal properties.) Calyx closed ; siliques columnar, - 

 3-sided, valves with a strong mid-vein ; stigma capitate ; seeds in a sin- 

 gle series ; cotyledons oblong, 0||. — Fls. yellow. 



1 E. cheiranthoides L. Pubescence minute, appressed, branched; lvs. lanceo- 

 late, denticulate, or entire; fls. small; siliques short (8 — 10"), on slender, spread- 

 ing pedicels ; stig. small, nearly sessile. — CD 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, -J as wide. Fls. small, yel- 

 low, in long racemes. Siliques \ to near 1' in length, linear, and somewhat 

 spreading. Jl. 



2 E. Arkansanum Nutt Yellow Phlox. Scabrous, with an appressed pu- 

 bescence ; 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. — CD 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 ra- 



