ORDER 13. CRUCIFEILE. 233 



eilique 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 Ivs. 

 FJs. yellowish. 



L. Michauxii Torr. (and L. aurea Torr.). On wet rocks S. E. Ky. to Texas. 

 Plant 26' high. Lvs. mostly radical, an inch or two in length, segm. 1 5, 

 angular. Fls. at first solitary, on slender scapes, finally racemed. Petals twiccv 

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

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



10. BARBAREA, E. 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 Ivs. toothed or pinnatifid at base ; siliques obscurely 

 ^angled, pointed with the style. D Fields and brooksides, common, JSL States. 

 Whole plant glabrous. St. furrowed, 1 2f high, branching above. Lower Ivs. 

 lyrate pinnatifid, with small, oblong pinnae, and a large, broad-ovate, terminal lobe, 

 dark green, shining, with clasping petioles ; upper Ivs. sessile, all very obtuse. Fls. 

 in dense racemes. Pods about 9" long, usually curved, ascending or erect. May, Jn. 



2 B. prdcox R. Br. BELLE ISLE CRESS. SCURVY GRASS. Upper Ivs. pinnati- 

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

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

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



11. ERYSIMUM, L. FALSE WALL FLOWER. (Gr. epvcj, 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; Ivs. lanceo- 

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

 ing pedicel* ; stig. small, nearly sessile. (D 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, ^ as wide. Fls. small, yel- 

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

 spreading. JJ. 



2 E. Arkaiisamim Nutt. YELLOW PHLOX. Scabrous, with an appressed pu- 

 bescence ; st. simple ; Ivs. linear-lanceolate, remotely dentate, sessile, lower ones 

 runcinate-toothed ; inflorescence racemous, corymbed at summit ; siliques long 

 (3'), erect, on short, erect pedicels ; stig. capitate. (D 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. ofHcinale Scop. HEDGE MUSTARD. Lvs. runcinate ; rac. slender, virgate ; 

 siliques subulate, erect, closely appressed to the rachis. OP A common weed, in 

 fields, roadsides, rubbish, etc., Can. and U. S. St. 1 3f high, with spreading 

 branches. Lower Ivs. 3 8' by 1 3', the lower segments placed at right angles 

 to the midvein, or pointing backwards, the terminal segment largest. Upper Ivs. 

 in 3 lanceolate segments at right angles. Fls. small, yellow, terminating the ra- 



