ORDER 11. CRUCIFER.E. 



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 (== o ). Leaves lyrate-pinnatifid. Fls. yellow. 



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



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

 Fliowy-panicled. Pod 9". May, June. 



2 I*, precox R. Br. Scurvy-grass. Upper Ivs. pinnatifid, with the lobes all linear 



oblong : siliqne 2-edged. y. % South. Pod 2 3'. May, June. 



10. ERYSIMUM, L. FALSE WALL-FLOWER. ('Epvoo, 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, \\ o . Lvs. narrow, undivided. Fls. yellow. 



1 E. cheirantlioides 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. 



Z E. Arkansanum N. Yellmv Phlox. Simple, scabrous ; Ivs. linear-lanceolate, 

 remotely dentate; rac. corymbed at top; pod long (30, erect; stig. capitate. (2) 

 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. (D Near Phila (A. H. Smith). Enr. 



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, fl o . Flowers small, yellow. 



1 S. officlnale 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. 



%, S. Sophia L. Flixweed. Lvs. bipinnatiftd, lobes linear-oblong, acute ; sep. longer 

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



3 S. can^scens 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. (D U. S. 1 2f. Mar. June. 



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

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

 der, raised on a slender stipe. Cotyledons oblong, jo. Glabrous, 

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

 curved and decliuate. 



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



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



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



Pet. oval, purple. September. 



13. HESPERIS, L. ROCKET. (''Etfxspa, evening, when the flower 

 i* most fragrant.) Calyx closed, shorter than the claw r s of the petals. Pet. 

 boil t obliquely, linear or obovate. Silique subterete. Seeds not margined. 

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



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

 tomlous, elongated (3'), erect, (fr, Shores of L. Erie (Haukeuson) and Huron. t 



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