ORDER 11. CRUCIFER^. 39 



9. BARBAREA, R Br. WINTER-CRESS. (Dedicated to Sta. Barbara.) 

 Sepals erect. Siliques columnar, 2 or 4-angled, valves carinate with a mid- 

 vein. Seeds in a single row (= c ). Leaves lyrate-pinnatifid. Fk. yellow. 



1 B. vulgaris R. Br. Upper Ivs. toothed or pinnatifid at base ; siliques obtusely 4- 



angled, pointed with the style. Brooksides : common. 1 2f. Racemes dense, 

 Fhowy-pauicled. Pod 9". May, June. 



2 B. precox R. Br. Scurry-grass. Upper Ivs. pinnatifid, with the lobes all linear 



oblong ; silique 2-edged. V %t South. Pod 2 3'. May, June. 



10. ERYSIMUM, L. FALSE WALL-FLOWER. (Epvco, to cure ; from 

 its salutary medicinal properties.) Calyx closed. Siliques columnar, 4- 

 sided, valves with a strong mid-vein. Stigma capitate. Seeds in a single 

 series. Cotyledons oblong, f o . Lvs. narrow, undivided. Fls. yellow. 



1 E. chefrantlioides L. Pubescence minute, appressed, branched; Ivs. lanceo- 



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

 pedicels ; stig. small, nearly sessile. (T) Wet grounds. 1 2f. Rac. long. July. 



2 E. Arkansanum N. Yellow Phlox. Simple, scabrous; Ivs. linear-lanceolate, 



remotely dentate ; rac. corymbed at top ; pod long (30, erect ; stig. capitate, (a) 

 Bluffs, O. to Ark. 2 3f. Flowers large, orange-yellow. June, July. 



3 E. orientale R. Br. Glabrous and glaucous; radical Ivs. obovate, stem Ivs. cor- 



date-clasping, obtuse, entire ; fls. white. (J) Near Phila (A. H. Smith). Eur. 



11. 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, || o . Flowers small, yellow. 



1 S. officinaJe Scop. Hedge Mustard. Leaves runcinate ; racemes slender, virgate ; 



siliques subulate, erect, closely appressed to the rachis. (T) A common weed, with 

 branches at right angles. 1 3f. June Sept. 



2 S. Sophia L. Flixweed. Lvs. bipinnatifid, lobes linear-oblong, acute ; sep. longer 



than pet. ; pod linear, erect, longer than the spreading pedicel. (T) N. Y. Can. 



3 S. canescens Nutt. Tansey Mustard. Lvs. bipinnatifid, canescent, lobes oblong, 



subdentate, obtuse ; pet. about equalling the calyx ; pod oblong-linear, 3 6", ascend- 

 ing, shorter (or never longer) than the spreading pedicel. (I) U. S. 1 2f. Mar. June. 



12. WAREA, N. (Named for Mr. Ware, the discoverer.) Sep. colored, 

 ligulate. Pet. with veiy slender claws. Silique flattened, long and slen- 

 der> raised on a slender stipe. Cotyledons oblong, fl o . @ Glabrous, 

 entire-leaved. Flowers white or purple, in short racemes. Siliques 

 curved and declinate. 



1 W. cuneifolia N. Lvs. oblong, obtuse, cuncate at base, and subsessile. Ga. Fla. 



1 2f. Pet. obovate, white. September. 



2 W. amplexifolia N. Lvs. oblong-ovate, partly clasping. Sand hills, Fla 1 2f. 



Pet. oval, purple. September. 



13. HESPERIS, L. ROCKET. ("EdTtEpa, evening, when the flower 

 is most fragrant.) Calyx closed, shorter than the claws of the petals. Pet 

 bent obliquely, linear or obovate. Silique subterete. Seeds not margined. 

 Stig. forked, with the apices converging (f o ). Flowers white or purple. 

 H. matronalis L. Simple, erect; Ivs. lance-ovate, denticulate; pet. obovate; pod 



torulous, elongated (30, erect. (2) Shores of L. Erie (Hankenson) and Huron. t 



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